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:
Nov. 08, 2011
Filed:
Feb. 02, 2009
Noam Eshel, Pardesiyya, IL;
Zeituni Golan, Kfar Saba, IL;
Noam Eshel, Pardesiyya, IL;
Zeituni Golan, Kfar Saba, IL;
Advasense Technologies Ltd., Ra'anana, IL;
Abstract
A device that includes a pixel array and a sample and hold circuit configured to provide sampled current to the pixel array wherein the sample and hold circuit includes a first transistor, a capacitor and a pair of current mirrors. The pair of current minors are connected to the first transistor and wherein the capacitor is connected to a drain of the first transistor. The sample and hold circuit is configured to sample an input current during a sampling phase to provide a sampled current, wherein the sampling includes: providing the input current to the pair of current mirrors and allowing the capacitor to be charged to the capacitor voltage that is a function of the input current; store, during a hold phase, the capacitor voltage; wherein the capacitor voltage forces an output stage of the sample and hold circuit to output a current that is substantially equal to the sampled current; and utilize the pair of current mirrors to force the gate, source and drain voltages of the first transistor to be equal to each other during the hold phase.