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:
Mar. 25, 2014
Filed:
Jan. 18, 2012
Applicant:
Quan Wan, Belmont, MA (US);
Inventor:
Quan Wan, Belmont, MA (US);
Assignee:
Analog Devices, Inc., Norwood, MA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H03F 3/45 (2006.01);
U.S. Cl.
CPC ...
Abstract
A power-efficient, rail-to-rail input circuit includes two differential pairs, one having devices of a first threshold voltage and one having devices of a second, different threshold voltage. In various embodiments, the two differential pairs receive a differential input in parallel and are supplied a tail current, which a control circuit steers between the pairs in accordance with a common-mode level of the input.