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:
Apr. 17, 1979
Filed:
Oct. 12, 1977
Applicant:
Inventor:
James W Williams, Lynchburg, VA (US);
Assignee:
General Electric Company, Lynchburg, VA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04B / ;
U.S. Cl.
CPC ...
325-3 ; 325 64 ; 179 / ;
Abstract
Some radio repeaters receive a voice signal on a first frequency and an information tone signal on a second frequency, and transmit both the voice and tone signals on a third frequency. A circuit is provided to sense the presence of the tone signal and to filter that frequency from the voice signal and also attenuate the remainder of the voice frequencies. The filter prevents the voice signal from interfering with the tone signal, and the attenuator prevents the transmitter modulator from being overloaded, thus providing improved repeater transmission of the tone frequency.