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:
Mar. 19, 1985
Filed:
Dec. 27, 1982
Applicant:
Inventor:
Hideyo Ono, Hyogo, JP;
Assignee:
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
H04B / ; H03G / ;
U.S. Cl.
CPC ...
381 94 ; 381121 ; 381108 ;
Abstract
An aural transmitter device is improved by largely eliminating the amplification of ambient environmental noise. To this end, control may be effected in response to the difference between a smoothed, rectified output of an amplifier and a reference voltage, either with or without a high-pass filter for removing low frequency noise components.