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:
Dec. 02, 1997
Filed:
Mar. 19, 1996
Applicant:
Inventors:
John E Gersbach, Burlington, VT (US);
Charles J Masenas, Jr, Essex Junction, VT (US);
Assignee:
International Business Machines Corporation, Armonk, NY (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G05F / ;
U.S. Cl.
CPC ...
323315 ; 323308 ;
Abstract
A circuit for delivering an accurate reference current independent of operating frequency that is implementable on-chip and that is relatively insensitive to process and temperature variations. A frequency source controls a rate of charge transfer via a switched capacitor to generate a constant current over different frequencies. A complimentary doped FET provides a band gap voltage imposed over a known resistance to generate the output current.