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:
May. 31, 2016
Filed:
Nov. 06, 2015
Applicant:
Inphi Corporation, Santa Clara, CA (US);
Inventors:
Mohammad Ranjbar, Santa Clara, CA (US);
Jorge Pernillo, Daly City, CA (US);
Assignee:
INPHI CORPORATION, Santa Clara, CA (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
H03M 1/10 (2006.01); H03M 1/68 (2006.01); H03M 1/38 (2006.01);
U.S. Cl.
CPC ...
H03M 1/1028 (2013.01); H03M 1/38 (2013.01); H03M 1/68 (2013.01);
Abstract
The present invention is directed integrated circuits and methods thereof. More specifically, an embodiment of the present invention provides a comparator calibration loop where a digital integrator stores a running sum based on the output of a comparator. A DAC converts the running sum and generates an offset calibration voltage, which is filtered by a low-pass filter module, and the filtered offset calibration voltage is used to cancel out the intrinsic offset voltage and low frequency noise of the comparator. There are other embodiments as well.