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:
Apr. 05, 1994
Filed:
Jul. 29, 1992
Applicant:
Inventors:
Dao-Long Chen, Fort Collins, CO (US);
Robert D Waldron, Fort Collins, CO (US);
Assignee:
NCR Corporation, Dayton, OH (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H03B / ; H03B / ;
U.S. Cl.
CPC ...
331 57 ; 307602 ; 307603 ; 307606 ; 3311 / ; 3311 / ; 3311 / ;
Abstract
A differential inverter such as may be used in an oscillator circuit. The differential inverter is connected between first and second current sources. The differential inverter includes first and second single signal CMOS inverters connected in parallel between the first and second controlled current sources. Each of the current sources is a MOS transistor. A bias circuit is connected to the control gates of the MOS transistors and provides bias signals thereto, the bias circuit includes a variable current source with bias signals being generated in response to the current flow in the variable current source.