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:
Apr. 11, 2023
Filed:
Jun. 07, 2021
Omnivision Technologies, Inc., Santa Clara, CA (US);
Robert Johansson, Oslo, NO;
OmniVision Technologies, Inc., Santa Clara, CA (US);
Abstract
A low power SRAM (static RAM) for an image sensor includes a voltage generation circuit for providing a positive supply voltage Vand a negative supply V, wherein VDD>V>V>V; a plurality of memory cells coupled to a respective plurality of column sense lines in a pixel array, the plurality of memory cells receiving differential inputs dp and dn; and a Gray counter coupled to switchably couple Vand Vto the differential inputs dp and dn of the plurality of memory cells. A method of operating an image sensor with a low power SRAM includes acquiring an image by the image sensor; generating Vand Vsuch that V>V>V>V; receiving an output g of a column of pixels at a clock input of a memory cell; and switchably coupling Vand Vto the differential inputs dp and dn of a plurality of memory cells in the SRAM according to a codeword from a Gray counter.