Single Photon Avalanche Diodes in Standard CMOS Processes

#circuits #cmos #design #electronics
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In the last few decades, Single Photon Avalanche Diodes (SPADs) have emerged as a paradigm changing optical detector. This has been aided by significant progress in the development of SPADs in solid-state technologies, especially in CMOS processes. As a result of their high gain and sensitivity, fast response, digital-like outputs, integration with readout circuits, and ruggedness, they are extremely attractive for a wide range of applications such as automotive (LiDAR), biomedical (FLIM), high-energy physics, HDR imaging, and even quantum computing. This talk will introduce the operating principles of SPADs, realization of different types of SPADs in conventional CMOS processes and their associated performance metrics, different readout circuits, and SPAD-based sensors. Experimentally verified prototypes of CMOS SPADs and SPAD-based sensing systems for a variety of applications will be used to illustrate the advantages and possibilities of these detectors.


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  • Date: 27 Jul 2023
  • Time: 06:00 PM to 07:00 PM
  • All times are (UTC-07:00) Pacific Time (US & Canada)
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  • Starts 16 July 2023 07:00 PM
  • Ends 27 July 2023 07:00 PM
  • All times are (UTC-07:00) Pacific Time (US & Canada)
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  Speakers

Dr. Shaan Sengupta of Texas Instruments

Topic:

Single Photon Avalanche Diodes in Standard CMOS Processes

In the last few decades, Single Photon Avalanche Diodes (SPADs) have emerged as a paradigm changing optical detector. This has been aided by significant progress in the development of SPADs in solid-state technologies, especially in CMOS processes. As a result of their high gain and sensitivity, fast response, digital-like outputs, integration with readout circuits, and ruggedness, they are extremely attractive for a wide range of applications such as automotive (LiDAR), biomedical (FLIM), high-energy physics, HDR imaging, and even quantum computing. This talk will introduce the operating principles of SPADs, realization of different types of SPADs in conventional CMOS processes and their associated performance metrics, different readout circuits, and SPAD-based sensors. Experimentally verified prototypes of CMOS SPADs and SPAD-based sensing systems for a variety of applications will be used to illustrate the advantages and possibilities of these detectors.

Biography:

Shaan Sengupta (Member, IEEE) received the B.Eng. degree in electrical and electronics engineering from Manipal University, Manipal, Karnataka, India, in 2010, the M.S. degree in electrical and computer engineering from the University of Florida, Gainesville, FL, USA, in 2012, and the Ph.D. degree in electrical and computer engineering from Oregon State University, Corvallis, OR, USA, in 2021. 
 
From 2012 to 2014, he was a Research Programmer at the University of Florida, where he worked on battery powered wireless sensor platforms. In 2014, he was an Electrical Engineer at Verigo, a UF spinout developing wireless sensors for cold-chain logistics. From 2017 to 2019, he held internship positions with Intel, Hillsboro, OR, USA, and with Texas Instruments, Tucson, AZ, USA, respectively. 
 
He is currently an Analog Design Engineer with Texas Instruments, where he works on the design of analog and mixed-signal circuits for next-generation precision sensors. His research interests include the design of circuits and transducers for low-power biomedical, environmental, high-energy physics, and emerging sensing applications. 
 
Dr. Sengupta received the Honorable Mention Award from the 64th IEEE International Midwest Symposium on Circuits and Systems (MWSCAS) Student Paper Contest in 2021. He has served as a reviewer for the IEEE Transactions on Biomedical Circuits and Systems, IEEE Transactions on Circuits and Systems - I: Regular Papers, IEEE Transactions on Circuits and Systems - II: Express Briefs, IEEE Open Journal of Circuits and Systems, and IEEE Photonics Letters.