The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 23, 2026
Filed:
Dec. 19, 2024
Omnivision Technologies, Inc., Santa Clara, CA (US);
Zhe Gao, San Jose, CA (US);
Tom Freson, Sunnyvale, CA (US);
Hyunyong Jung, San Jose, CA (US);
Myonglae Chu, San Jose, CA (US);
Ling Fu, Cupertino, CA (US);
OmniVision Technologies, Inc., Santa Clara, CA (US);
Abstract
A sample and hold circuit includes a pixel level connection coupled to a pixel cell. In a voltage domain global shutter operation, a reset voltage and a signal voltage are sampled and stored in a reset capacitor and a signal capacitor sequentially. In readout, the stored signal voltage is read out first to a comparing circuit to determine the best gain factor for the analog to digital converter (ADC) circuit to fully utilize the conversion range of the ADC to achieve a better signal to noise ratio. Once the better gain is determined and set for the ADC by comparing the signal voltage with a pre-determined threshold voltage, the same signal voltage is converted directly to become a digital signal value by the ADC. Then, the stored reset voltage is converted to a digital reset value by the ADC without changing the gain factor, to shorten the readout time.