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. 08, 1996
Filed:
Sep. 17, 1993
Applicant:
Inventors:
Donald J Ashley, Endicott, NY (US);
Michael J Johnson, Raleigh, NC (US);
Assignee:
International Business Machines Corporation, Armonk, NY (US);
Attorneys:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H03K / ; H03B / ;
U.S. Cl.
CPC ...
327379 ; 327384 ; 327391 ; 327108 ;
Abstract
Two controlled current gate drives are provided for driving parallel P and N channel pass devices, so that the rise time of the voltage at one gate of the pass devices overlaps with the fall time of the other to reduce capacitive signal coupling of the signal applied to an FET gate to the FET source and drain. Low-level current sources drive the gates of the pass devices with opposite polarities. A current mirror is used to control the currents provided by the gate drives to control the tradeoff between switching speed and switching noise coupling.