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. 13, 2003
Filed:
Mar. 11, 2002
Applicant:
Inventors:
Douglas R. Beck, Seattle, WA (US);
David J. Allstot, Seattle, WA (US);
Assignee:
University of Washington, Seattle, WA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
A03K 5/00 ;
U.S. Cl.
CPC ...
A03K 5/00 ;
Abstract
Methods and apparatuses for double-sampling a signal using an operational amplifier having dedicated unswitched connections to sample and hold circuits. In one embodiment, a circuit according to the teachings of the present invention includes an op-amp having four input terminals. Two of the input terminals are tied to ground and the other two terminals are coupled to S/H circuits through unswitched connections. In one embodiment, the S/H circuits are coupled to sample an input signal during different clock phases.