21
Alexander I Krymski: Low-power signal chair for image sensors. Aptina Imaging Corporation, Dickstein Shapiro, March 31, 2009: US07511755 (2 worldwide citation)

A signal chain for an image sensor is disclosed. The signal chain includes photo sensing elements, pixel readout circuits, and an amplifier. Each pixel readout circuit receives a charge-induced signal and a reset signal from one of the photo sensing elements. The readout circuit computes a differenc ...


22
Eric R Fossum, Alexander I Krymski, Roger A Panicacci, Christopher Clark: Method of operating an image sensor having a digital exposure circuit. Round Rock Research, Lerner David Littenberg Krumholz & Mentlik, September 10, 2013: US08531550 (1 worldwide citation)

Automatic exposure adjusting device considers the image on a pixel-by-pixel basis. Each pixel is characterized according to its most significant bits. After the pixels are characterized, the number of pixels in any particular group is counted. That counting is compared with thresholds which set whet ...


23
Alexander I Krymski: Low-power signal chain for image sensors. Aptina Imaging Corporation, Nancy Y Ru, July 10, 2012: US08218051 (1 worldwide citation)

A signal chain for an image sensor is disclosed. The signal chain includes photo sensing elements, pixel readout circuits, and an amplifier. Each pixel readout circuit receives a charge-induced signal and a reset signal from one of the photo sensing elements. The readout circuit computes a differenc ...


24
Nikolai E Bock, Alexander I Krymski, Barmak Mansoorian: High-speed sampling of signals in active pixel sensors. Aptina Imaging Corporation, Dickstein Shapiro, December 8, 2009: US07630011 (1 worldwide citation)

Techniques are disclosed for enhancing the speed at which pixel levels are read out and sampled for processing. A method of processing pixel levels includes clamping a pixel readout line to a voltage level less than a voltage corresponding to a signal sensed by an n-MOS pixel. Subsequently, the pixe ...


25
Alexander I Krymski, Kwang Bo: Low voltage analog-to-digital converters with internal reference voltage and offset. Micron Technology, Dickstein Shapiro Morin & Oshinsky, May 20, 2003: US06567029 (1 worldwide citation)

An A-to-D converter system having programmed reference signal levels using only supply signal provided by a power supply is disclosed. The converter system includes a comparator configured to provide comparison of an analog input signal with an adjustable reference level. The converter system also i ...


26
Vladimir Berezin, Alexander I Krymski, Eric R Fossum: CMOS active image sensor with common pixel transistors and binning capability. Round Rock Research, Lerner David Littenberg Krumholz & Mentlik, September 10, 2013: USRE044482

A lock in pinned photodiode photodetector includes a plurality of output ports which are sequentially enabled. Each time when the output port is enabled is considered to be a different bin of time. A specified pattern is sent, and the output bins are investigated to look for that pattern. The time w ...


27
Vladimir Berezin, Alexander I Krymski, Eric R Fossum: Pinned photodiode photodetector with common pixel transistors and binning capability. Round Rock Research, Lerner David Littenberg Krumholz & Mentlik, April 12, 2011: USRE042292

A lock in pinned photodiode photodetector includes a plurality of output ports which are sequentially enabled. Each time when the output port is enabled is considered to be a different bin of time. A specified pattern is sent, and the output bins are investigated to look for that pattern. The time w ...


28
Alexander I Krymski: Variable quantization ADC for image sensors. Round Rock Research, Lerner David Littenberg Krumholz & Mentlik, September 30, 2014: US08847809

An A/D converter suitable for use in a system in which the signal power of noise increases with the signal power of the signal, such as an imaging system, utilizes a variable quantization system for converting analog signals into digital signals. The variable quantization is controlled so that low s ...


29
Vladimir Berezin, Alexander I Krymski: Method of operating a CMOS APS pixel sensor. Round Rock Research, Lerner David Littenberg Krumholz & Mentlik, August 26, 2014: USRE045094

A method of operating a CMOS imager is presented wherein a reset transistor source/drain of a first pixel is biased with a first voltage source, a source follower transistor of a second pixel is biased with the same first voltage source, a reset transistor source/drain of the second pixel is biased ...


30
Nikolai E Bock, Alexander I Krymski, Barmak Mansoorian: High speed sampling of signals in active pixel sensors using buffer circuitry. Aptina Imaging, Dickstein Shapiro, October 26, 2010: US07821557

Techniques are disclosed for enhancing the speed at which pixel levels are read out and sampled for processing. A method of processing pixel levels includes clamping a pixel readout line to a voltage level less than a voltage corresponding to a signal sensed by an n-MOS pixel. Subsequently, the pixe ...