Conference Proceedings | Integrated Microsystems Laboratory

58

Machine Learning Models for Human Fall Detection using Millimeter Wave Sensor

M. A. Alanazi, A. K. Alhazmi, C. Yakopcic, and V. P. Chodavarapu, "Machine Learning Models for Human Fall Detection using Millimeter Wave Sensor", Proceedings of IEEE 55th Annual Conference on Information Sciences and Systems (CISS), March 24-26, 2021.

57

A Dual-Ring Breath-Mode MEMS-Based 10.00 MHz GPS-Disciplined Reference Oscillator

M. S. Islam, G. Xereas, V. Chodavarapu, and S. Mandal, “”A Dual-Ring Breath-Mode MEMS-Based 10.00 MHz GPS-Disciplined Reference Oscillator”, Presented at the 2020 Joint Conference of the IEEE International Frequency Control Symposium & International Symposium on Applications of Ferroelectrics, Keystone, CO, July 2020.

56

GPS-Disciplined MEMS Oscillators for Amateur Radio Applications

M. S. Islam, G. Xereas, V. P. Chodavarapu, and S. Mandal, “GPS-Disciplined MEMS Oscillators for Amateur Radio Applications,” presented at the 2nd HamSCI Workshop, Cleveland, OH, March 2019.

55

A Study of the Heat Spreading Capabilities of Mass Via Arrays (MVA)

D. A. Smarra, M.C. Wicks, and V.P. Chodavarapu, and "A Study of the Heat Spreading Capabilities of Mass Via Arrays (MVA)", Presented at IEEE National Aerospace & Electronics Conference (NAECON), Dayton, Ohio, July 2019

54

Chip Scale Tunable Nanosecond Pulsed Electric Field Generator for Electroporation

T. Kadja, A. Kota, and V. P. Chodavarapu,"Chip Scale Tunable Nanosecond Pulsed Electric Field Generator for Electroporation", Presented at IEEE National Aerospace & Electronics Conference (NAECON), Dayton, Ohio, July 2019

53

5000+ Hours Operation of High Temperature Digital Smart Node for Distributed Jet Engine Control

S. P. Gogineni, C. J. Ruscher, V. P. Chodavarapu, G. Subramanyam, K. Semega, and A. Behbahani, "5000+ Hours Operation of High Temperature Digital Smart Node for Distributed Jet Engine Control", To be Presented at the AIAA 2019 AIAA Propulsion and Energy Forum and Exposition (ITAR Session), Indianapolis, 2019

52

Frequency Analysis of a Stand-Alone Shoe-Mounted Localization Device

P. Merat, E. J. Harvey, G. D. Mitsis, and V. P. Chodavarapu, “Frequency Analysis of a Stand-Alone Shoe-Mounted Localization Device”, Proceedings of IEEE National Aerospace & Electronics Conference (NAECON), Dayton, Ohio, July 2018.

51

A Stencil Printed Textile-based Silver-Zinc Battery for Powering Sensors

A. Kota, A. Neidhard-Doll, and V. P. Chodavarapu, “A Stencil Printed Textile-based Silver-Zinc Battery for Powering Sensors”, Proceedings of IEEE National Aerospace & Electronics Conference (NAECON), Dayton, Ohio, July 2018.

50

A Generalized 1-Dimensional Temperature Model for Mass Via Arrays (MVA)

D. A. Smarra, M. Wicks, and V. P. Chodavarapu, “A Generalized 1-Dimensional Temperature Model for Mass Via Arrays (MVA)”, Proceedings of IEEE National Aerospace & Electronics Conference (NAECON), Dayton, Ohio, July 2018.

49

Improving Inertial Sensor Performance by Reducing Errors using Deep Learning Methodology

H. Chen, P. Agarwal, T. M. Taha and V. P. Chodavarapu, “Improving Inertial Sensor Performance by Reducing Errors using Deep Learning Methodology”, Proceedings of IEEE National Aerospace & Electronics Conference (NAECON), Dayton, Ohio, July 2018

48

Microfabrication and Packaging Process for a Single-Chip Position, Navigation, and Timing System

Junjun Huan, Vamsy P. Chodavarapu, George Xereas and Charles Allan, "Microfabrication and Packaging Process for a Single-Chip Position, Navigation, and Timing System", Proceedings of International Microelectronics Assembly and Packaging Society (IMAPS), Raleigh, NC, October 2017.

47

Embedded Passive Circuit Elements in Low Temperature Co-Fired Ceramic Substrates for Aerospace Electronics

Devin A. Smarra, Guru Subramanyam, Vamsy P. Chodavarapu, Sivaram P. Gogineni, Kenneth J. Semega and Alireza R. Behbahani, "Embedded Passive Circuit Elements in Low Temperature Co-Fired Ceramic Substrates for Aerospace Electronics", Proceedings of International Microelectronics Assembly and Packaging Society (IMAPS) Symposium, Raleigh, NC, October 2017.

46

Towards Autonomous Depth Perception for Surveillance in Real World Environments

Gayatri M. Behara and Vamsy P. Chodavarapu,"Towards Autonomous Depth Perception for Surveillance in Real World Environments", Proceedings of IEEE International Conference on Autonomic Computing (ICAC), Columbus, Ohio, July 2017.

45

Towards Autonomous Surveillance in Real World Environments

Gayatri M. Behara and Vamsy P. Chodavarapu, "Towards Autonomous Surveillance in Real World Environments", Proceedings of IEEE National Aerospace & Electronics Conference (NAECON), Dayton, Ohio, June 2017

44

Design and Analysis of Wafer-level Vacuum-Encapsulated Disk Resonator

Balaadithya Uppalapati, Jalal Ahamed, Vamsy P. Chodavarapu, "Design and Analysis of Wafer-level Vacuum-Encapsulated Disk Resonator", Proceedings of IEEE National Aerospace & Electronics Conference, (NAECON), Dayton, Ohio, June 2017

43

Energy Harvesting Flexible Regenerative Power Source for Wearable Devices

Ritu Kumar, Guru Subramanyam and Vamsy P. Chodavarapu, "Energy Harvesting Flexible Regenerative Power Source for Wearable Devices", IEEE National Aerospace and Electronics Conference, Dayton, OH, July 2016.

42

Wafer-Level Vacuum-Encapsulated Ultra-Low Voltage Tuning Fork MEMS Resonator

Junjun Huan, George Xereas and Vamsy P. Chodavarapu, "Wafer-Level Vacuum-Encapsulated Ultra-Low Voltage Tuning Fork MEMS Resonator", IEEE National Aerospace and Electronics Conference, Dayton, OH, July 2016.

41

Wide Temperature Range Resonant-Mode Absolute MEMS Pressure Sensor

G. Xereas, C. Allan and V. P. Chodavarapu, "Wide Temperature Range Resonant-Mode Absolute MEMS Pressure Sensor", Proceedings of IEEE National Aerospace and Electronics Conference, Dayton, Ohio, June 2015.

40

Design of a Sigma-Delta Modulator in Standard CMOS Process for Wide-Temperature Operation

Y. Wang and V. P. Chodavarapu, "Design of a Sigma-Delta Modulator in Standard CMOS Process for Wide-Temperature Operation", Proceedings of IEEE International Symposium on Quality Electronic Design (ISQED), Santa Clara, California, March 2015.

39

Nanocrystalline Cellulose Thin Films for Optical Encryption

Y. P. Zhang, K. Allahverdyan, T. Morse, V. P. Chodavarapu, A. G. Kirk, T. Galstian. M. P. Andrews,"Nanocrystalline Cellulose Thin Films for Optical Encryption", Proceedings of SPIE Optics and Photonics Conference, San Diego, August 2014. (Invited)

38

High-Temperature General Purpose Operational Amplifier in IBM 0.13 μm CMOS Process

Y. Wang and V. P. Chodavarapu, "High-Temperature General Purpose Operational Amplifier in IBM 0.13 μm CMOS Process", Proceedings of IEEE International Conference on Electron Devices and Solid-State Circuits (EDSSC), Chengdu, China, June 2014.

37

All-Digital Time-Mode Elliptic Filters Based on the Operational Simulation of LC Ladders

M. Abdelfattah, G. W. Roberts, and V. P. Chodavarapu, "All-Digital Time-Mode Elliptic Filters Based on the Operational Simulation of LC Ladders", Proceedings of IEEE International Symposium on Circuits and Systems (ISCAS), Melbourne, Australia, June 2014.

36

Wide-Temperature Range 8-bit Digital to Analog Converter in Bulk CMOS Process

K. Greig and V. P. Chodavarapu, "'Extreme Wide-Temperature Range 8-bit Digital to Analog Converter in Bulk CMOS Process", Proceedings of IEEE Canadian Conference on Electrical and Computer Engineering (CCECE), Toronto, May 5 2014.

35

Design of a CMOS Readout Circuit for Wide-Temperature Range Capacitive MEMS Sensors

Y. Wang and V. P. Chodavarapu, "Design of a CMOS Readout Circuit for Wide-Temperature Range Capacitive MEMS Sensors", Proceedings of IEEE International Symposium on Quality Electronic Design (ISQED), Santa Clara, California, March 2014.

34

Design and Fabrication of 3-Axis Accelerometer Sensor System for Harsh Environment Applications using Semi-Custom Process

A. Merdassi, Y. Wang, G. Xereas and V. P. Chodavarapu, "Design and Fabrication of 3-Axis Accelerometer Sensor System for Harsh Environment Applications using Semi-Custom Process", Proceedings of SPIE MOEMS-MEMS Conference, San Francisco, Feb 2014.

33

Design of Active Temperature Compensated Composite Free-Free Beam MEMS Resonators in a Standard Process

G. Xereas and V. P. Chodavarapu, "Design of Active Temperature Compensated Composite Free-Free Beam MEMS Resonators in a Standard Process", Proceedings of SPIE MOEMS-MEMS Conference, San Francisco, Feb 2014.

32

Design of CMOS Capacitance to Frequency Converter for High-Temperature MEMS Sensors

Y. Wang and V. P. Chodavarapu, "Design of CMOS Capacitance to Frequency Converter for High-Temperature MEMS Sensors", Proceedings of IEEE Sensors Conference, Baltimore, November 2013.

31

Amorphous Silicon Carbide Based Anemometer for Harsh and Corrosive Air/gas flow Measurements

A. Merdassi and V. P. Chodavarapu, "Amorphous Silicon Carbide Based Anemometer for Harsh and Corrosive Air/gas flow Measurements", Proceedings of the 16th Canadian Semiconductor Science and Technology Conference, Thunder Bay, August 16 2013.

30

Design of Temperature Compensated Radio Frequency Free-Free beam MEMS Resonators using a Commercial Process

G. Xereas and V. P. Chodavarapu, "Design of Temperature Compensated Radio Frequency Free-Free beam MEMS Resonators using a Commercial Process", Proceedings of IEEE Canadian Conference on Electrical and Computer Engineering (CCECE), Regina, May 2013.

29

Design of 3-axis Capacitive Low-Gravity MEMS Accelerometer with Zero Cross-Axis Sensitivity in a Commercial Process

A. Merdassi and V. P. Chodavarapu, "Design of 3-axis Capacitive Low-Gravity MEMS Accelerometer with Zero Cross-Axis Sensitivity in a Commercial Process", Proceedings of NanoTech Conference, Washington DC, May 2013.

28

Towards Wireless Implantable Pressure Sensor to Monitor Compartment Syndrome in Trauma Victims

Y. Wang, C. Allen, S. AL-Qahtani, A. Merdassi, V. P. Chodavarapu, E. Harvey, and J. Henderson, "Towards Wireless Implantable Pressure Sensor to Monitor Compartment Syndrome in Trauma Victims", Proceedings of NanoTech Conference, Washington DC, May 2013.

27

Nanocrystalline Cellulose for Covert Optical Encryption

M. Andrews, R. Singh, T. Morse, T. Mack, Y. P. Zhang, V. P. Chodavarapu, A. G. Kirk, "Nanocrystalline Cellulose for Covert Optical Encryption", Proceedings of MRS Spring Meeting, San Francisco, April, 2013.

26

A Study of a Self Diagnostic Platform for the Detection of A2 Biomarker for Leishmania Donovani

P. J. R. Roche, M. C. K. Cheung, V. P. Chodavarapu, B. Ward, M. Ndao, A. G. Kirk, "A Study of a Self Diagnostic Platform for the Detection of A2 Biomarker for Leishmania Donovani", Proceedings of SPIE Photonics West (BiOS), San Francisco, 2012.

25

A Nanorod Polymer Micro-Array Formed by Microcontact Printing

P. J. R. Roche, S. Wang, M. C. K. Cheung, V. P. Chodavarapu, A. G. Kirk, "A Nanorod Polymer Micro-Array Formed by Microcontact Printing", Proceedings of SPIE Photonics West (BiOS), San Francisco, 2012.

24

Optical Mapping by Low-Cost Instrumentation and Disposable Chemically Induced Nanochannels

P. J. R. Roche, M. C. K. Cheung, L. Beitel, M. A. Trifiro, A. G. Kirk, V. P. Chodavarapu, "Optical Mapping by Low-Cost Instrumentation and Disposable Chemically Induced Nanochannels", Proceedings of SPIE Photonics West (BiOS), San Francisco, 2012.

23

Nanocrystalline Cellulose for Covert Optical Encryption

M. P. Andrews, Y. P. Zhang, V. P. Chodavarapu, A. K. Kirk, "Nanocrystalline Cellulose for Covert Optical Encryption", Proceedings of SPIE Photonics West (BiOS), San Francisco, 2012.

22

CMOS Direct Time Interval Measurement of Long-Lived Luminescence Lifetimes

L. Yao, K. Yi Yung, M. C. Cheung, V. P. Chodavarapu, F. V. Bright, "CMOS Direct Time Interval Measurement of Long-Lived Luminescence Lifetimes", Proceedings of IEEE EMBC Conference, Boston, 2011.

21

Origin of Iridescence in Chiral Nematic Phase Nanocrystalline Cellulose for Encryption and Enhanced Color

Yu Ping Zhang, M. Andrews, A. G. Kirk, V. P. Chodavarapu, "Origin of Iridescence in Chiral Nematic Phase Nanocrystalline Cellulose for Encryption and Enhanced Color", Proceedings of SPIE Photonics West (OPTO), San Francisco, 2011.

20

Demonstration of a Reusable Plasmonic Polymer Microarray Sensing Platform

P. J. R. Roche, M. C. Cheung, S. Taslimi, A. G. Kirk, V. P. Chodavarapu, "Demonstration of a Reusable Plasmonic Polymer Microarray Sensing Platform", Proceedings of SPIE Photonics West (BiOS), San Francisco, 2011.

19

Enhancement in Sensitivity and Detection of Luminescent Quenching based Oxygen Sensing by Gold Nanoparticles

P. J. R. Roche, M. C. Cheung, L. Yao, A. G. Kirk, V. P. Chodavarapu, "Enhancement in Sensitivity and Detection of Luminescent Quenching based Oxygen Sensing by Gold Nanoparticles", Proceedings of SPIE Photonics North, Niagara Falls, 2010.

18

Dry Etch Fabrication of Ultra-thin Porous Silicon Membranes

M. Hajj-Hassan, M. C. Cheung, V. P. Chodavarapu, "Dry Etch Fabrication of Ultra-thin Porous Silicon Membranes", Proceedings of SPIE Photonics North, Niagara Falls, 2010.

17

Dry Etched Nanoporous Silicon Substrates for Optical Biosensors

M. Hajj-Hassan, M. C. Cheung, V. P. Chodavarapu, "Dry Etched Nanoporous Silicon Substrates for Optical Biosensors", Proceedings of SPIE Photonics West (BiOS), San Francisco, 2010.

16

Enabling Intelligent Readout of Optical Signals from Nanoscale Sensors

L. Yao, V. Tripathi, K. Yi Yung, V. P. Chodavarapu, A. N. Cartwright, F. V. Bright, "Enabling Intelligent Readout of Optical Signals from Nanoscale Sensors", Proceedings of SPIE Photonics West (BiOS), San Jose, 2009. (Invited Paper)

15

Brain Machine Interfaces combining Microelectrode Arrays with Nanostructured Optical Biochemical Sensors

M. Hajj-Hassan, S. Musallam, T. Gonzalez, E. Ghafer-Zadeh, D. Therriault, V. Chodavarapu, M. Andrews, "Brain Machine Interfaces combining Microelectrode Arrays with Nanostructured Optical Biochemical Sensors", Proceedings of SPIE Photonics West (BiOS), San Jose, 2009.

14

Optical Biochemical Sensors by Direct-Writing of Nanostructured Recognition Elements

M. Hajj-Hassan, T. Gonzalez, E. Ghafer-Zadeh, V. Chodavarapu, M. Andrews, "Optical Biochemical Sensors by Direct-Writing of Nanostructured Recognition Elements", Proceedings of 30th IEEE EMBS Conference, Vancouver, 2008. (Invited Paper)

13

Bacteria Growth Monitoring through a CMOS based Capacitive Sensor

E. Ghafer-Zadeh, M. Sawan, A. Shabani, M. Zourob, V. Chodavarapu, "Bacteria Growth Monitoring through a CMOS based Capacitive Sensor", Proceedings of 14th IEEE International Mixed-Signal, Sensors, and Systems Test Workshop, Vancouver, 2008.

12

CMOS Imager Microsystem for Multi-Bacteria Detection

L. Yao, M. Hajj-Hassan, V. Chodavarapu, A. Shabani, B. Allain, M. Zourob, R. Mandeville, "CMOS Imager Microsystem for Multi-Bacteria Detection", Proceedings of IEEE NEWCAS Conference, Montreal, 2008.

11

CMOS Capacitive Sensor System for Bacteria Detection using Phage Organisms

L. Yao, M. Hajj-Hassan, E. Ghafar-Zadeh, A. Shabani, V. Chodavarapu, M. Zourob, "CMOS Capacitive Sensor System for Bacteria Detection using Phage Organisms", Proceedings of IEEE Canadian Conference on Electrical and Computer Engineering, Niagara Falls, 2008.

10

Direct-Write Patterning of Nanostructured Sensory Waveguides for Integrated Optical Bioimaging Applications

M. Hajj-Hassan, T. Gonzalez, H. Djeghelian, E. Ghafer-Zadeh, D. Therriault, V. Chodavarapu, M. Andrews, "Direct-Write Patterning of Nanostructured Sensory Waveguides for Integrated Optical Bioimaging Applications", Proceedings of SPIE Photonics West (BIOS), San Jose, 2008. (Invited Paper)

9

CMOS Microsystems for Phase Fluorometric Biochemical Monitoring

A. N. Cartwright, V. P. Chodavarapu, S. J. Kim, A. H. Titus, R. M. Bukowski, F. V. Bright, "CMOS Microsystems for Phase Fluorometric Biochemical Monitoring", Proceedings of IEEE/URSI ISSSE, Montreal, 2007.

8

CMOS Chemical and Biochemical Sensors using Nanostructured Materials

S. J. Kim, V. P. Chodavarapu, A. H. Titus, F. V. Bright, V. Govindaraju, A. N. Cartwright, "CMOS Chemical and Biochemical Sensors using Nanostructured Materials", Digest of the IEEE LEOS Summer Topical Meetings, Portland, 2007. (Invited Paper)

7

Nanostructured Porous Polymeric Photonic Bandgap Structures for Sensing

S. J. Kim, , V. P. Chodavarapu, A. H. Titus, A. N. Cartwright, M. T. Swihart, R. M. Bukowski, F. V. Bright, T. J. Bunning, "Nanostructured Porous Polymeric Photonic Bandgap Structures for Sensing", Proceedings of SPIE Photonics West (BIOS), San Jose, 2007. (Invited Paper)

6

Tunable Porous Photonic Bandgap Structures for Chemical and Biological Sensing

S. J. Kim, V. P. Chodavarapu, K. Firdous, V. K. S. Hsiao, A. N. Cartwright, M. T. Swihart, P. N. Prasad, T. J. Bunning, "Tunable Porous Photonic Bandgap Structures for Chemical and Biological Sensing", Proceedings of SPIE Optics and Photonics Conference, vol. 6322, San Diego, 2006. (Invited Paper)

5

CMOS-based Biosensor System using Integrated Nanostructured Recognition Elements

V. P. Chodavarapu, D. O. Shubin, R. M. Bukowski, A. H. Titus, A. N. Cartwright, F. V. Bright, "CMOS-based Biosensor System using Integrated Nanostructured Recognition Elements", Proceedings of SPIE Photonics West (BIOS), Vol. 6095, pp. 126-133, San Jose, 2006.

4

CMOS ISFET-based Microsystem for Biomedical Applications

V. P. Chodavarapu, A. H. Titus, A. N. Cartwright, "CMOS ISFET-based Microsystem for Biomedical Applications", Proceedings of IEEE Sensors Conference, pp. 109-112, Irvine, 2005.

3

CMOS Mixed-Signal Phase Detector for Integrated Chemical Sensor Systems

. P. Chodavarapu, D. O. Shubin, R. M. Bukowski, A. H. Titus, A. N. Cartwright, F. V. Bright, "CMOS Mixed-Signal Phase Detector for Integrated Chemical Sensor Systems", Proceedings of IEEE Sensors Conference, pp. 1068-1071, Irvine, 2005.

2

CMOS Integrated Optical Sensor using Phase Detection

V. P. Chodavarapu, S. P. Khanolkar, E. C. Tehan, A. H. Titus, A. N. Cartwright, F. V. Bright, "CMOS Integrated Optical Sensor using Phase Detection", Proceedings of IEEE Sensors Conference, pp. 1266-1270, Toronto, 2003.

1

Optical Design Tools for Photonics Engineering Education

A. N. Cartwright, P. Gopalam, V. P. Chodavarapu, B. Kirkey, "Optical Design Tools for Photonics Engineering Education", Proceedings of American Society for Engineering Education conference, paper 2024, Montreal, 2002.

Publications

Conference

Machine Learning Models for Human Fall Detection using Millimeter Wave Sensor

M. A. Alanazi, A. K. Alhazmi, C. Yakopcic, and V. P. Chodavarapu, "Machine Learning Models for Human Fall Detection using Millimeter Wave Sensor", Proceedings of IEEE 55th Annual Conference on Information Sciences and Systems (CISS), March 24-26, 2021.

A Dual-Ring Breath-Mode MEMS-Based 10.00 MHz GPS-Disciplined Reference Oscillator

GPS-Disciplined MEMS Oscillators for Amateur Radio Applications

M. S. Islam, G. Xereas, V. P. Chodavarapu, and S. Mandal, “GPS-Disciplined MEMS Oscillators for Amateur Radio Applications,” presented at the 2nd HamSCI Workshop, Cleveland, OH, March 2019.

A Study of the Heat Spreading Capabilities of Mass Via Arrays (MVA)

D. A. Smarra, M.C. Wicks, and V.P. Chodavarapu, and "A Study of the Heat Spreading Capabilities of Mass Via Arrays (MVA)", Presented at IEEE National Aerospace & Electronics Conference (NAECON), Dayton, Ohio, July 2019

Chip Scale Tunable Nanosecond Pulsed Electric Field Generator for Electroporation

T. Kadja, A. Kota, and V. P. Chodavarapu,"Chip Scale Tunable Nanosecond Pulsed Electric Field Generator for Electroporation", Presented at IEEE National Aerospace & Electronics Conference (NAECON), Dayton, Ohio, July 2019

5000+ Hours Operation of High Temperature Digital Smart Node for Distributed Jet Engine Control

Frequency Analysis of a Stand-Alone Shoe-Mounted Localization Device

P. Merat, E. J. Harvey, G. D. Mitsis, and V. P. Chodavarapu, “Frequency Analysis of a Stand-Alone Shoe-Mounted Localization Device”, Proceedings of IEEE National Aerospace & Electronics Conference (NAECON), Dayton, Ohio, July 2018.

A Stencil Printed Textile-based Silver-Zinc Battery for Powering Sensors

A. Kota, A. Neidhard-Doll, and V. P. Chodavarapu, “A Stencil Printed Textile-based Silver-Zinc Battery for Powering Sensors”, Proceedings of IEEE National Aerospace & Electronics Conference (NAECON), Dayton, Ohio, July 2018.

A Generalized 1-Dimensional Temperature Model for Mass Via Arrays (MVA)

D. A. Smarra, M. Wicks, and V. P. Chodavarapu, “A Generalized 1-Dimensional Temperature Model for Mass Via Arrays (MVA)”, Proceedings of IEEE National Aerospace & Electronics Conference (NAECON), Dayton, Ohio, July 2018.

Improving Inertial Sensor Performance by Reducing Errors using Deep Learning Methodology

H. Chen, P. Agarwal, T. M. Taha and V. P. Chodavarapu, “Improving Inertial Sensor Performance by Reducing Errors using Deep Learning Methodology”, Proceedings of IEEE National Aerospace & Electronics Conference (NAECON), Dayton, Ohio, July 2018

Microfabrication and Packaging Process for a Single-Chip Position, Navigation, and Timing System

Junjun Huan, Vamsy P. Chodavarapu, George Xereas and Charles Allan, "Microfabrication and Packaging Process for a Single-Chip Position, Navigation, and Timing System", Proceedings of International Microelectronics Assembly and Packaging Society (IMAPS), Raleigh, NC, October 2017.

Embedded Passive Circuit Elements in Low Temperature Co-Fired Ceramic Substrates for Aerospace Electronics

Towards Autonomous Depth Perception for Surveillance in Real World Environments

Gayatri M. Behara and Vamsy P. Chodavarapu,"Towards Autonomous Depth Perception for Surveillance in Real World Environments", Proceedings of IEEE International Conference on Autonomic Computing (ICAC), Columbus, Ohio, July 2017.

Towards Autonomous Surveillance in Real World Environments

Gayatri M. Behara and Vamsy P. Chodavarapu, "Towards Autonomous Surveillance in Real World Environments", Proceedings of IEEE National Aerospace & Electronics Conference (NAECON), Dayton, Ohio, June 2017

Design and Analysis of Wafer-level Vacuum-Encapsulated Disk Resonator

Balaadithya Uppalapati, Jalal Ahamed, Vamsy P. Chodavarapu, "Design and Analysis of Wafer-level Vacuum-Encapsulated Disk Resonator", Proceedings of IEEE National Aerospace & Electronics Conference, (NAECON), Dayton, Ohio, June 2017

Energy Harvesting Flexible Regenerative Power Source for Wearable Devices

Ritu Kumar, Guru Subramanyam and Vamsy P. Chodavarapu, "Energy Harvesting Flexible Regenerative Power Source for Wearable Devices", IEEE National Aerospace and Electronics Conference, Dayton, OH, July 2016.

Wafer-Level Vacuum-Encapsulated Ultra-Low Voltage Tuning Fork MEMS Resonator

Junjun Huan, George Xereas and Vamsy P. Chodavarapu, "Wafer-Level Vacuum-Encapsulated Ultra-Low Voltage Tuning Fork MEMS Resonator", IEEE National Aerospace and Electronics Conference, Dayton, OH, July 2016.

Wide Temperature Range Resonant-Mode Absolute MEMS Pressure Sensor

G. Xereas, C. Allan and V. P. Chodavarapu, "Wide Temperature Range Resonant-Mode Absolute MEMS Pressure Sensor", Proceedings of IEEE National Aerospace and Electronics Conference, Dayton, Ohio, June 2015.

Design of a Sigma-Delta Modulator in Standard CMOS Process for Wide-Temperature Operation

Y. Wang and V. P. Chodavarapu, "Design of a Sigma-Delta Modulator in Standard CMOS Process for Wide-Temperature Operation", Proceedings of IEEE International Symposium on Quality Electronic Design (ISQED), Santa Clara, California, March 2015.

Nanocrystalline Cellulose Thin Films for Optical Encryption

Y. P. Zhang, K. Allahverdyan, T. Morse, V. P. Chodavarapu, A. G. Kirk, T. Galstian. M. P. Andrews,"Nanocrystalline Cellulose Thin Films for Optical Encryption", Proceedings of SPIE Optics and Photonics Conference, San Diego, August 2014. (Invited)

High-Temperature General Purpose Operational Amplifier in IBM 0.13 μm CMOS Process

Y. Wang and V. P. Chodavarapu, "High-Temperature General Purpose Operational Amplifier in IBM 0.13 μm CMOS Process", Proceedings of IEEE International Conference on Electron Devices and Solid-State Circuits (EDSSC), Chengdu, China, June 2014.

All-Digital Time-Mode Elliptic Filters Based on the Operational Simulation of LC Ladders

M. Abdelfattah, G. W. Roberts, and V. P. Chodavarapu, "All-Digital Time-Mode Elliptic Filters Based on the Operational Simulation of LC Ladders", Proceedings of IEEE International Symposium on Circuits and Systems (ISCAS), Melbourne, Australia, June 2014.

Wide-Temperature Range 8-bit Digital to Analog Converter in Bulk CMOS Process

K. Greig and V. P. Chodavarapu, "'Extreme Wide-Temperature Range 8-bit Digital to Analog Converter in Bulk CMOS Process", Proceedings of IEEE Canadian Conference on Electrical and Computer Engineering (CCECE), Toronto, May 5 2014.

Design of a CMOS Readout Circuit for Wide-Temperature Range Capacitive MEMS Sensors

Y. Wang and V. P. Chodavarapu, "Design of a CMOS Readout Circuit for Wide-Temperature Range Capacitive MEMS Sensors", Proceedings of IEEE International Symposium on Quality Electronic Design (ISQED), Santa Clara, California, March 2014.

Design and Fabrication of 3-Axis Accelerometer Sensor System for Harsh Environment Applications using Semi-Custom Process

A. Merdassi, Y. Wang, G. Xereas and V. P. Chodavarapu, "Design and Fabrication of 3-Axis Accelerometer Sensor System for Harsh Environment Applications using Semi-Custom Process", Proceedings of SPIE MOEMS-MEMS Conference, San Francisco, Feb 2014.

Design of Active Temperature Compensated Composite Free-Free Beam MEMS Resonators in a Standard Process

G. Xereas and V. P. Chodavarapu, "Design of Active Temperature Compensated Composite Free-Free Beam MEMS Resonators in a Standard Process", Proceedings of SPIE MOEMS-MEMS Conference, San Francisco, Feb 2014.

Design of CMOS Capacitance to Frequency Converter for High-Temperature MEMS Sensors

Y. Wang and V. P. Chodavarapu, "Design of CMOS Capacitance to Frequency Converter for High-Temperature MEMS Sensors", Proceedings of IEEE Sensors Conference, Baltimore, November 2013.

Amorphous Silicon Carbide Based Anemometer for Harsh and Corrosive Air/gas flow Measurements

A. Merdassi and V. P. Chodavarapu, "Amorphous Silicon Carbide Based Anemometer for Harsh and Corrosive Air/gas flow Measurements", Proceedings of the 16th Canadian Semiconductor Science and Technology Conference, Thunder Bay, August 16 2013.

Design of Temperature Compensated Radio Frequency Free-Free beam MEMS Resonators using a Commercial Process

G. Xereas and V. P. Chodavarapu, "Design of Temperature Compensated Radio Frequency Free-Free beam MEMS Resonators using a Commercial Process", Proceedings of IEEE Canadian Conference on Electrical and Computer Engineering (CCECE), Regina, May 2013.

Design of 3-axis Capacitive Low-Gravity MEMS Accelerometer with Zero Cross-Axis Sensitivity in a Commercial Process

A. Merdassi and V. P. Chodavarapu, "Design of 3-axis Capacitive Low-Gravity MEMS Accelerometer with Zero Cross-Axis Sensitivity in a Commercial Process", Proceedings of NanoTech Conference, Washington DC, May 2013.

Towards Wireless Implantable Pressure Sensor to Monitor Compartment Syndrome in Trauma Victims

Y. Wang, C. Allen, S. AL-Qahtani, A. Merdassi, V. P. Chodavarapu, E. Harvey, and J. Henderson, "Towards Wireless Implantable Pressure Sensor to Monitor Compartment Syndrome in Trauma Victims", Proceedings of NanoTech Conference, Washington DC, May 2013.

Nanocrystalline Cellulose for Covert Optical Encryption

M. Andrews, R. Singh, T. Morse, T. Mack, Y. P. Zhang, V. P. Chodavarapu, A. G. Kirk, "Nanocrystalline Cellulose for Covert Optical Encryption", Proceedings of MRS Spring Meeting, San Francisco, April, 2013.

A Study of a Self Diagnostic Platform for the Detection of A2 Biomarker for Leishmania Donovani

P. J. R. Roche, M. C. K. Cheung, V. P. Chodavarapu, B. Ward, M. Ndao, A. G. Kirk, "A Study of a Self Diagnostic Platform for the Detection of A2 Biomarker for Leishmania Donovani", Proceedings of SPIE Photonics West (BiOS), San Francisco, 2012.

A Nanorod Polymer Micro-Array Formed by Microcontact Printing

P. J. R. Roche, S. Wang, M. C. K. Cheung, V. P. Chodavarapu, A. G. Kirk, "A Nanorod Polymer Micro-Array Formed by Microcontact Printing", Proceedings of SPIE Photonics West (BiOS), San Francisco, 2012.

Optical Mapping by Low-Cost Instrumentation and Disposable Chemically Induced Nanochannels

P. J. R. Roche, M. C. K. Cheung, L. Beitel, M. A. Trifiro, A. G. Kirk, V. P. Chodavarapu, "Optical Mapping by Low-Cost Instrumentation and Disposable Chemically Induced Nanochannels", Proceedings of SPIE Photonics West (BiOS), San Francisco, 2012.

Nanocrystalline Cellulose for Covert Optical Encryption

M. P. Andrews, Y. P. Zhang, V. P. Chodavarapu, A. K. Kirk, "Nanocrystalline Cellulose for Covert Optical Encryption", Proceedings of SPIE Photonics West (BiOS), San Francisco, 2012.

CMOS Direct Time Interval Measurement of Long-Lived Luminescence Lifetimes

L. Yao, K. Yi Yung, M. C. Cheung, V. P. Chodavarapu, F. V. Bright, "CMOS Direct Time Interval Measurement of Long-Lived Luminescence Lifetimes", Proceedings of IEEE EMBC Conference, Boston, 2011.

Origin of Iridescence in Chiral Nematic Phase Nanocrystalline Cellulose for Encryption and Enhanced Color

Yu Ping Zhang, M. Andrews, A. G. Kirk, V. P. Chodavarapu, "Origin of Iridescence in Chiral Nematic Phase Nanocrystalline Cellulose for Encryption and Enhanced Color", Proceedings of SPIE Photonics West (OPTO), San Francisco, 2011.

Demonstration of a Reusable Plasmonic Polymer Microarray Sensing Platform

P. J. R. Roche, M. C. Cheung, S. Taslimi, A. G. Kirk, V. P. Chodavarapu, "Demonstration of a Reusable Plasmonic Polymer Microarray Sensing Platform", Proceedings of SPIE Photonics West (BiOS), San Francisco, 2011.

Enhancement in Sensitivity and Detection of Luminescent Quenching based Oxygen Sensing by Gold Nanoparticles

P. J. R. Roche, M. C. Cheung, L. Yao, A. G. Kirk, V. P. Chodavarapu, "Enhancement in Sensitivity and Detection of Luminescent Quenching based Oxygen Sensing by Gold Nanoparticles", Proceedings of SPIE Photonics North, Niagara Falls, 2010.

Dry Etch Fabrication of Ultra-thin Porous Silicon Membranes