26 patents
Utility
Duty-cycle-correcting clock distribution architecture
5 Dec 23
Clock and other cyclical signals are driven onto respective capacitively-loaded segments of a distribution path via inverting buffer stages that self-correct for stage-to-stage duty cycle error, yielding a balanced signal duty cycle over the length of the distribution path.
Dexue Zhang
Filed: 6 Sep 22
Utility
Time-resolved quanta image sensor
14 Nov 23
Multi-stage auto-zeroing signal amplifiers are deployed within event-shuttering pixels of a quanta image sensor (QIS) pixel array to enable reliable per-pixel reporting of photonic events, down to resolution of a single photon strike, for each of a continuous sequence of sub-microsecond event-detection intervals.
Dexue Zhang, Saleh Masoodian, Jiaju Ma
Filed: 27 Jan 22
Utility
Dual-progression pixel readout
7 Nov 23
Row-by-row pixel read-out is executed concurrently within respective clusters of pixels of a pixel array, alternating the between descending and ascending progressions in the intra-cluster row readout sequence to reduce temporal skew between neighboring pixel rows in adjacent clusters.
Jiaju Ma
Filed: 24 Feb 23
Utility
Luminance-guided image de-mosaicing and de-noising
19 Sep 23
Chrominance data channels are reconstructed from a color-mosaic image data input and de-noised with guidance from a luminance data channel extracted from that same mosaic data input to produce de-noised chrominance channels.
Omar Elgendy, Jiaju Ma, Saleh Masoodian, Stanley Chan
Filed: 7 Apr 22
Utility
Column-interleaved pixel array
15 Aug 23
Shared-readout pixels conventionally disposed in two or more physical columns of a pixel array are spatially interleaved (merged) within a single physical column to yield a pixel array in which each physical pixel column includes two or more logical columns of shared-readout pixels coupled to respective logical-column output lines.
Jiaju Ma, Saleh Masoodian
Filed: 8 Apr 22
Utility
Scalable-pixel-size image sensor
8 Aug 23
Photodetection elements within an integrated-circuit pixel array are dynamically configurable to any of at least three uniform-aspect-ratio, size-scaled pixel footprints through read-out-time control of in-pixel transfer gates associated with respective photodetection elements and binning transistors coupled between the transfer gates for respective clusters of the photodetection elements and a shared reset node.
Jiaju Ma, Michael Guidash
Filed: 12 Aug 21
Utility
Scalable-pixel-size image sensor
8 Aug 23
A pixel array within an integrated-circuit image sensor includes four sets of photodetection elements disposed in respective pixel-array regions having a shared corner, four readout circuits each coupled to a respective one of the four sets of photodetection elements, a reset node, a reset transistor, and binning transistors.
Jiaju Ma, Michael Guidash
Filed: 28 Jun 22
Utility
Low noise bandgap circuit
1 Aug 23
Multiple temperature-proportional cores are implemented within a bandgap circuit to deliver respective, uncorrelated temperature-proportional currents to a temperature-complementary load, reducing flicker noise in the resulting bandgap reference voltage.
Xin Yue
Filed: 9 Sep 21
Utility
SRAM with small-footprint low bit-error-rate readout
4 Jul 23
Conventional SRAM sense-amplifiers are replaced by small-footprint keeper circuits that enable single-ended SRAM readout without bitline precharge, simplifying and relaxing the timing of SRAM cell access and bitline sampling operations and thus enabling potentially faster readout operation and/or lower bit error rate.
Dexue Zhang
Filed: 19 Oct 20
Utility
Split-readout image sensor
18 Apr 23
First and second readout circuits, each having a respective floating diffusion node, are coupled to a photodetection element within a pixel of an integrated-circuit image sensor.
Jiaju Ma, Saleh Masoodian
Filed: 8 Apr 22
Utility
Sub-ranging programmable gain amplifier
14 Mar 23
A sub-ranging programmable gain amplifier resolves an incoming signal into one of multiple amplitude sub-ranges and dynamically steps down the PGA output according to the identified sub-range.
Xin Yue, Dexue Zhang, Jiaju Ma
Filed: 2 Jun 21
Utility
Dual-progression pixel readout
28 Feb 23
Row-by-row pixel read-out is executed concurrently within respective clusters of pixels of a pixel array, alternating the between descending and ascending progressions in the intra-cluster row readout sequence to reduce temporal skew between neighboring pixel rows in adjacent clusters.
Jiaju Ma
Filed: 7 Apr 22
Utility
Image sensor having column-level correlated-double-sampling charge transfer amplifier
29 Nov 22
Correlated double sampling column-level readout of an image sensor pixel may be provided by a charge transfer amplifier that is configured and operated to itself provide for both correlated-double-sampling and amplification of floating diffusion potentials read out from the pixel onto a column bus after reset of the floating diffusion (I) but before transferring photocharge to the floating diffusion (the reset potential) and (ii) after transferring photocharge to the floating diffusion (the transfer potential).
Jiaju Ma, Saleh Masoodian
Filed: 24 May 19
Utility
High-sensitivity depth sensor with non-avalanche photodetector
8 Nov 22
A sensing device includes a light source to emit light, a light sensor to detect reflection of the emitted light and distance determination circuitry responsive to reflected-light detection within the light sensor.
Saleh Masoodian, Jiaju Ma
Filed: 31 Jan 20
Utility
Duty-cycle-correcting clock distribution architecture
11 Oct 22
Clock and other cyclical signals are driven onto respective capacitively-loaded segments of a distribution path via inverting buffer stages that self-correct for stage-to-stage duty cycle error, yielding a balanced signal duty cycle over the length of the distribution path.
Dexue Zhang
Filed: 13 May 21
Utility
Luminance-guided image de-mosaicing and de-noising
10 May 22
Chrominance data channels are reconstructed from a color-mosaic image data input and de-noised with guidance from a luminance data channel extracted from that same mosaic data input to produce de-noised chrominance channels.
Omar Elgendy, Jiaju Ma, Saleh Masoodian, Stanley Chan
Filed: 13 Nov 20
Utility
Image sensor with multi-patterned isolation well
10 May 22
Pixel isolation wells in a semiconductor image sensor are implemented via two or more photoresist patterning phases and two or more corresponding dopant implantation operations.
Jiaju Ma
Filed: 7 Jun 20
Utility
Split-readout image sensor
10 May 22
First and second readout circuits, each having a respective floating diffusion node, are coupled to a photodetection element within a pixel of an integrated-circuit image sensor.
Jiaju Ma, Saleh Masoodian
Filed: 11 May 20
Utility
Column-interleaved pixel array
10 May 22
Shared-readout pixels conventionally disposed in two or more physical columns of a pixel array are spatially interleaved (merged) within a single physical column to yield a pixel array in which each physical pixel column includes two or more logical columns of shared-readout pixels coupled to respective logical-column output lines.
Jiaju Ma, Saleh Masoodian
Filed: 28 Aug 20
Utility
Dual-progression pixel readout
10 May 22
Row-by-row pixel read-out is executed concurrently within respective clusters of pixels of a pixel array, alternating the between descending and ascending progressions in the intra-cluster row readout sequence to reduce temporal skew between neighboring pixel rows in adjacent clusters.
Jiaju Ma
Filed: 23 Oct 21