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:
Oct. 08, 2002
Filed:
Aug. 31, 2001
Applicant:
Inventors:
Bhupendra Kumar Ahuja, Fremont, CA (US);
Eric Glen Hoffman, Fremont, CA (US);
Assignee:
Exar Corporation, Fremont, CA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H03M 1/44 ;
U.S. Cl.
CPC ...
H03M 1/44 ;
Abstract
A method and circuitry for implementing low-power analog-to-digital converters. More particularly, embodiments of the present invention provide an amplifier circuit for pipeline ADCs having multiple stages, some in sample mode, some in hold mode. The stages include residue amplifiers which include a pre-amp and a current source. The current source is turned off during the sample mode. Some embodiments include a second current source that provides a bleeder current during the sample phase so that the pre-amp remains in steady state.