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. 21, 2009
Filed:
Dec. 06, 2006
Kwok-fu Chiu, San Jose, CA (US);
Kwok-Fu Chiu, San Jose, CA (US);
National Semiconductor Corportaion, Santa Clara, CA (US);
Abstract
Described herein is technology for, among other things, input bias current cancellation. The technology includes a bipolar differential pair coupled with a supply voltage (V). The bipolar differential pair includes a first transistor and a second transistor. The technology further includes an input bias current cancellation circuit coupled with the bipolar differential pair and including a third transistor. The third transistor has a collector-emitter voltage V, and the bipolar differential pair is operable to receive an input voltage greater than V−2Vwithout causing the third transistor to operate in the saturation region.