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:
Oct. 29, 1996
Filed:
Jul. 11, 1994
Applicant:
Inventor:
Kei Nishioka, Kyoto, JP;
Assignee:
Rohm Co., Ltd., Kyoto, JP;
Attorneys:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H04B / ;
U.S. Cl.
CPC ...
381 94 ;
Abstract
There is substantially provided a muting control circuit in which there is no difference in muting time between the muting utilizing capacitor charging and that utilizing capacitor discharging. A constant current source is in parallel with an external capacitor. The constant current source operates so as to decrease a charging current in the course of charging the external capacitor 20, whereas it operates so as to increase a discharging current in the course of discharging. Therefore, no substantial difference in muting time occurs.