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Alexander I Krymski, Vladimir Berezin: Frame shutter for CMOS APS. Dickstein Shapiro Morin & Oshinsky, November 18, 2004: US20040227060-A1

A CMOS Active Pixel Sensor (APS) uses a pinned photodiode as a photoreceptor and negative-channel metal-oxide semiconductor (NMOS) transistors in the sample and hold and reset circuits of the frame shutter. The pinned photodiode increases the quantum efficiency and reduces the dark current. The NMOS ...


32
Alexander I Krymski, Kwang Bo Cho: Look ahead rolling shutter system in CMOS sensors. Dickstein Shapiro Morin & Oshinsky, March 17, 2005: US20050057674-A1

A shutter system for a pixel array is disclosed. The system includes a read shift register, first and second reset shift registers, and a plurality of logic gates. The read shift register is configured to sequentially count rows of the pixel array from top to bottom, such that the read shift registe ...


33
Alexander I Krymski, Vladimir Berezin: Frame shutter for CMOS APS. Scott C Harris, Fish & Richardson PC, May 30, 2002: US20020063198-A1

A CMOS Active Pixel Sensor (APS) uses a pinned photodiode as a photoreceptor and negative-channel metal-oxide semiconductor (NMOS) transistors in the sample and hold and reset circuits of the frame shutter. The pinned photodiode increases the quantum efficiency and reduces the dark current. The NMOS ...


34
Alexander I Krymski, Kwang Bo Austin Cho: Low voltage analog-to-digital converters with internal reference voltage and offset. Photobit Corporation a Delaware Corporation, Scott C Harris, Fish & Richardson PC, July 4, 2002: US20020084927-A1

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 ...


35
Alexander I Krymski: Image sensor with pixels having multiple capacitive storage elements. Micron Technology C O Tom D Amico, Dickstein Shapiro Moran & Oshinsky, April 24, 2003: US20030076431-A1

An apparatus has a pixel that includes (i) a buffer transistor having an input, (ii) first and second capacitive storage elements each of which selectively can be coupled to the input of the buffer transistor, and (iii) a photosensitive element having an output which selectively can be coupled to th ...


36
Alexander I Krymski, Kwang Bo: Low voltage analog-to-digital converters with internal reference voltage and offset. Dickstein Shapiro Morin & Oshinsky, January 15, 2004: US20040008134-A1

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 ...


37
Alexander I Krymski: Method and apparatus for reducing kTC noise in an active pixel sensor (APS) device. Scott C Harris, Fish & Richardson PC, November 28, 2002: US20020175269-A1

An image sensing device, such as a CMOS Active Pixel Sensor (APS) device, includes an array of pixels. Each pixel includes a reset transistor connected between a photodetector and a supply voltage. In a readout operation, a signal integrated onto the photodetector is sampled onto a holding capacitor ...


38
Alexander I Krymski: Wide dynamic range operation for CMOS sensor with freeze-frame shutter. Scott C Harris, Fish & Richardson PC, June 27, 2002: US20020080263-A1

Wide dynamic range operation is used to write a signal in a freeze-frame pixel into the memory twice, first after short integration and then after long integration. The wide dynamic range operation allows the intra-scene dynamic range of images to be extended by combining the image taken with a shor ...


39
Alexander I Krymski: Low-power signal chair for image sensors. Dickstein Shapiro Morin & Oshinsky, September 8, 2005: US20050195300-A1

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 ...


40
Eric R Fossum, Alexander I Krymski, Roger A Panicacci, Christopher Clark: Digital exposure circuit for an image sensor. Dickstein Shapiro Morin & Oshinsky, September 8, 2005: US20050195314-A1

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 ...