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:
Sep. 15, 1998
Filed:
Jan. 02, 1997
Applicant:
Inventor:
Henry Yang, Santa Clara, CA (US);
Assignee:
OmniVision Technologies, Inc., Sunnyvale, CA (US);
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G05F / ; H03L / ; H03K / ;
U.S. Cl.
CPC ...
323274 ; 327307 ; 327313 ;
Abstract
A DC clamping circuit acting on an input signal to clamp the input signal to a voltage reference is disclosed. The DC clamping circuit comprises a comparator providing an output that decreases whenever the input signal is less than the output. A capacitor is connected to the output of the comparator for absorbing the charge output by the comparator. Finally, a differential amplifier is provided for subtracting the output of the comparator from the input signal and for adding the voltage reference.