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:
Jun. 29, 1999
Filed:
Nov. 08, 1996
Applicant:
Inventor:
Nobuyuki Yasutake, Kasugai, JP;
Assignee:
Fujitsu Limited, Kawasaki, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H03K / ; H03M / ;
U.S. Cl.
CPC ...
327387 ; 327103 ; 327108 ; 327563 ; 341136 ;
Abstract
When a pair of emitter-coupled transistor switches 22A and 22B are switched over, the D flipflop 26A shifts the base potential of a transistor buffer circuit 24 to reduce a potential fluctuation at a constant current source 21, reducing a current oscillation caused by the transient response of the constant current source 21 in which feedback control is performed by a comparator 214. In another construction, a potential oscillation waveform of the connected emitter node is stored in a RAM and the waveform read out of the RAM is added to the base of the transistor buffer circuit to reduce the current oscillation.