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. 26, 1993
Filed:
Aug. 11, 1992
Applicant:
Inventor:
Charles A Brown, Corvallis, OR (US);
Assignee:
Hewlett-Packard Company, Palo Alto, CA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H03F / ;
U.S. Cl.
CPC ...
330260 ; 330293 ;
Abstract
An apparatus and method is disclosed for minimizing the loading effect of the feedback network on the output voltage of an op-amp circuit. A single current source is coupled to the output of the op-amp to provide a predetermined current. By properly selecting the current source to be equal to the current demanded by the feedback network, the output current of the op-amp is significantly reduced. In turn, the loading effects of the feedback network resistors on the op-amp are significantly reduced and the accuracy of the op-amp circuit gain is improved.