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. 23, 2013
Filed:
Feb. 11, 2010
Applicant:
Uday Dasgupta, Singapore, SG;
Inventor:
Uday Dasgupta, Singapore, SG;
Assignee:
MediaTek Singapore Pte. Ltd., Singapore, SG;
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
G05F 1/565 (2006.01);
U.S. Cl.
CPC ...
Abstract
A scheme for enhancement of the power-supply ripple rejection for operational amplifiers (op-amps) and low-dropout (LDO) voltage regulators is described. The scheme adds calculated amounts of current derived from the power-supply ripple with the input differential pair current to cancel off the output ripple, improving the high-frequency power-supply ripple rejection without requiring a substantial redesign of the circuitry involved.