1
Eric R Fossum, Zhimin Zhou, Bedabrata Pain: Capacitively coupled successive approximation ultra low power analog-to-digital converter. California Institute of Technology, Fish & Richardson P C, March 9, 1999: US05880691 (171 worldwide citation)

A capacitively-coupled successive approximation analog-to-digital converter utilizes a capacitively coupled multiplying digital to analog converter to generate a succession of voltages which are compared to the input voltage to be digitized. The capacitively coupled multiplying digital to analog con ...


2
Zhimin Zhou, Zhongxuan Zhang, Li yen Shih, Wei Li: Column readout multiplexer for CMOS image sensors with multiple readout and fixed pattern noise cancellation. PixArt Technology, Claude Hamrick, Oppenheimer W Donnelly, Justin Boyce, October 12, 1999: US05965871 (139 worldwide citation)

An active pixel sensing structure includes an array of pixel unit cells each of which an adapted to alternate between a light sensing mode wherein the cell outputs an image signal and a reset mode wherein the cell outputs a reset signal. The image signal is proportional to light incident on the cell ...


3
Eric R Fossum, Sunetra K Mendis, Bedabrata Pain, Robert H Nixon, Zhimin Zhou: Active pixel sensor having intra-pixel charge transfer with analog-to-digital converter. California Institute of Technology, Fish & Richardson P C, February 1, 2000: US06021172 (106 worldwide citation)

An imaging device formed as a monolithic complementary metal oxide semiconductor Integrated circuit in an industry standard complementary metal oxide semiconductor process, the integrated circuit including a focal plane array of pixel cells, each one of the cells including a photogate overlying the ...


4
Zhimin Zhou, Eric R Fossum, Bedabrata Pain: Integrated sensor with frame memory and programmable resolution for light adaptive imaging. California Institute of Technology, Fish & Richardson P C, June 1, 1999: US05909026 (93 worldwide citation)

An image sensor operable to vary the output spatial resolution according to a received light level while maintaining a desired signal-to-noise ratio. Signals from neighboring pixels in a pixel patch with an adjustable size are added to increase both the image brightness and signal-to-noise ratio. On ...


5
Eric R Fossum, Sunetra K Mendis, Bedabrata Pain, Robert H Nixon, Zhimin Zhou: Active pixel sensor having intra-pixel charge transfer with analog-to-digital converter. California Institute of Technology, Fish & Richardson P C, December 16, 2003: US06665013 (66 worldwide citation)

An imaging device formed as a monolithic complementary metal oxide semiconductor integrated circuit in an industry standard complementary metal oxide semiconductor process, the integrated circuit including a focal plane array of pixel cells, each one of the cells including a photogate overlying the ...


6
Eric R Fossum, Zhimin Zhou, Bedabrata Pain: Successive approximation analog-to-digital converter using balanced charge integrating amplifiers. California Institute of Technology, Fish & Richardson P C, August 11, 1998: US05793322 (30 worldwide citation)

An analog-to-digital converter for on-chip focal-plane image sensor applications. The analog-to-digital converter utilizes charge integrating amplifiers in a charge balancing architecture to implement successive approximation analog-to-digital conversion. This design requires minimal chip area and h ...


7
Zhimin Zhou, Bedabrata Pain: Charge integration successive approximation analog-to-digital converter for focal plane applications using a single amplifier. California Institute of Technology, Fish & Richardson P C, September 26, 2000: US06124819 (28 worldwide citation)

An analog-to-digital converter for on-chip focal-plane image sensor applications. The analog-to-digital converter utilizes a single charge integrating amplifier in a charge balancing architecture to implement successive approximation analog-to-digital conversion. This design requires minimal chip ar ...


8
Bedabrata Pain, Zhimin Zhou, Eric R Fossum: CMOS integration sensor with fully differential column readout circuit for light adaptive imaging. California Institute of Technology, Fish & Richardson P C, October 5, 2004: US06801258 (28 worldwide citation)

An imager that is better suited for low-light detection capability. In accordance with a preferred embodiment, the imager may be easily configured to provide an imager having multi-resolution capability where SNR can be adjusted for optimum low-level detectibility. Multi-resolution signal processing ...


9
Zhimin Zhou, Bedabrata Pain: Charge integration successive approximation analog-to-digital converter for focal plane applications using a single amplifier. California Institute of Technology, Fish & Richardson P C, July 27, 1999: US05929800 (18 worldwide citation)

An analog-to-digital converter for on-chip focal-plane image sensor applications. The analog-to-digital converter utilizes a single charge integrating amplifier in a charge balancing architecture to implement successive approximation analog-to-digital conversion. This design requires minimal chip ar ...


10
Zhimin Zhou, Eric R Fossum, Bedabrata Pain: Integrated sensor with frame memory and programmable resolution for light adaptive imaging. California Institute of Technology, Fish & Richardson P C, September 7, 2004: US06787749 (18 worldwide citation)

An image sensor operable to vary the output spatial resolution according to a received light level while maintaining a desired signal-to-noise ratio. Signals from neighboring pixels in a pixel patch with an adjustable size are added to increase both the image brightness and signal-to-noise ratio. On ...