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:
Jan. 26, 1982
Filed:
Apr. 08, 1980
Applicant:
Inventor:
Reisuke Sato, Kawagoe, JP;
Assignee:
Pioneer Electronic Corporation, Tokyo, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H03F / ; H03F / ;
U.S. Cl.
CPC ...
330149 ; 3301 / ; 330296 ;
Abstract
A car-mounted audio equipment of multiamplifier system including a single preamplifier, a plurality of power amplifiers and the corresponding number of differential amplifiers each connected between an output terminal of the preamplifier and an input terminal of each of the power amplifiers comprises a biasing means for biasing at least one of the ground terminals of the power amplifiers to a potential substantially equal to the ground potential when the one terminal is in an open state.