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:
Dec. 19, 2006
Filed:
Feb. 20, 2003
Steve Huang, Arcadia, CA (US);
Daniel Van Blerkom, Altadena, CA (US);
Sandor L. Barna, Pasadena, CA (US);
Giuseppe Rossi, Pasadena, CA (US);
Steve Huang, Arcadia, CA (US);
Daniel Van Blerkom, Altadena, CA (US);
Sandor L. Barna, Pasadena, CA (US);
Giuseppe Rossi, Pasadena, CA (US);
Micron Technology, Inc., Boise, ID (US);
Abstract
A reference voltage generator for use in an image sensor provides a reference voltage to an S/H block during a pixel read-out operation and another reference voltage to an analog-to-digital converter (ADC) during a digitization operation. The reference voltage generator includes a variable voltage generator, a sample-and-hold circuit to sample a reference voltage prior to the pixel read-out operation or the digitization operation, and a buffer amplifier to drive the appropriate reference voltage to the relatively high impedance load presented by the S/H block and the variable impedance load provided by the ADC.