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:
Jul. 22, 2014
Filed:
Jun. 13, 2012
Fazil Ahmad, Santa Clara, CA (US);
Fazil Ahmad, Santa Clara, CA (US);
Analog Devices, Inc., Norwood, MA (US);
Abstract
Apparatus and methods for electronic amplification are provided. In one embodiment, a method of electronic amplification includes amplifying a differential input voltage signal to generate a feed-forward signal, chopping the feed-forward signal at a chopping frequency to generate a chopped feed-forward signal, notch filtering the chopped feed-forward signal at the chopping frequency to generate a notched signal, generating an input offset correction signal based at least partly on the notched signal, and amplifying the differential input voltage signal using a signal amplification block to generate an output signal. Amplifying the differential input voltage signal using the signal amplification block includes chopping the input signal at the chopping frequency to generate a chopped input signal and combining the chopped input signal and the offset correction signal to reduce input offset error of the signal amplification block.