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:
Nov. 06, 2001
Filed:
Dec. 08, 1999
Applicant:
Inventor:
Johnny Q Zhang, San Jose, CA (US);
Assignee:
Hewlett-Packard Company, Palo Alto, CA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G06G 7/12 ; G06G 7/26 ;
U.S. Cl.
CPC ...
G06G 7/12 ; G06G 7/26 ;
Abstract
Clock circuitry on an integrated circuit chip includes a differential buffer with common-mode rejection circuitry. The differential buffer includes first and second DC paths, each including semiconductor devices connected in cascode circuits. A tap of the first path supplies bias voltage to control electrodes of devices of the first and second paths. Control electrodes of devices in the cascode circuits of the first and second paths are connected to be biased by opposite power supply voltages of the buffer.