Patent · US Active

Readout circuits and methods

US11555744B2 · kind B2 · utility

1Cited by

2References

23Claims

0Family size

Assignee

Obsidian Sensors, Inc. · US

Inventors

Edward Chan · New Providence, US
Bing Wen · Poway, US
John H. Hong · San Diego, US
Tallis Young Chang · San Diego, US
Seung-Tak Ryu · Daejeon, KR

Key dates

Filing date	Apr 17, 2019
Grant date	Jan 17, 2023
Priority date	—
Expiry date	Jun 21, 2039

Classification

Technology area (CPC G)Physics
CPC primaryG01J2001/444
WIPO fieldAudio-visual technology
WIPO sectorElectrical engineering

Abstract

Methods of sensor readout and calibration and circuits for performing the methods are disclosed. In some embodiments, the methods include driving an active sensor at a voltage. In some embodiments, the methods include use of a calibration sensor, and the circuits include the calibration sensor. In some embodiments, the methods include use of a calibration current source and circuits include the calibration current source. In some embodiments, a sensor circuit includes a Sigma-Delta ADC. In some embodiments, a column of sensors is readout using first and second readout circuits during a same row time.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.