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:
Jul. 19, 1983
Filed:
Dec. 21, 1981
Applicant:
Inventor:
Koichi Sakai, Tokyo, JP;
Assignee:
Toko, Inc., Tokyo, JP;
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
H03F / ;
U.S. Cl.
CPC ...
330267 ; 330307 ;
Abstract
A semiconductor integrated circuit device including a power amplifier circuit which includes a first PNP transistor, first NPN transistor, second PNP transistor and second NPN transistor which are formed in a common semiconductor substrate. The first PNP transistor is formed as a vertical type one which constitutes, together with the second NPN transistor, a first inverted Darlington circuit. The first NPN transistor, together with the second PNP transistor, constitutes a second inverted Darlington circuit. A d.c. power source is supplied to the emitter of the vertical type PNP transistor, with the emitter of the first NPN transistor being grounded.