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. 25, 1997
Filed:
Jan. 03, 1996
Applicant:
Inventor:
Tomio Takiguchi, Tokyo, JP;
Assignee:
NEC Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01H / ;
U.S. Cl.
CPC ...
307113 ; 327427 ; 327436 ; 323265 ; 323273 ; 323282 ; 307139 ; 307113 ; 307125 ;
Abstract
A constant current source is connected to a first node that connects on the one hand to a predetermined potential via a first switching transistor with a control electrode thereof connected to a signal input terminal, a second node, and a resistive conduction member, and on the other hand to a current output terminal via a second switching transistor with a control electrode thereof connected to the second node to constitute a current switching circuit operable without an external reference bias and with a reduced number of components.