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. 30, 1996
Filed:
Mar. 03, 1994
Applicant:
Inventor:
Jun Honda, Tokyo, JP;
Assignee:
Pioneer Electric Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H03F / ;
U.S. Cl.
CPC ...
307 64 ; 330-9 ; 330149 ; 330284 ; 307112 ; 327108 ; 327306 ;
Abstract
A power detector is provided for detecting closing of a power switch in a power supply, for producing a power-on signal after a predetermined time from detection of the closing of the power switch. An abnormality detector is provided for detecting an abnormal voltage produced in a circuit of a power amplifier, for producing an abnormality signal when detected. In response to the power-on signal, an output stage of the power amplifier is activated, and the output stage is cut off in response to the abnormality signal.