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:
Aug. 20, 1985
Filed:
Jul. 26, 1983
Applicant:
Inventor:
Tom L Blackburn, San Jose, CA (US);
Assignee:
GTE Communications Products Corporation, Phoenix, AZ (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04B / ;
U.S. Cl.
CPC ...
370 74 ; 328133 ; 329 50 ;
Abstract
A signal detection circuit having a balanced modem is described. A switching circuit responsive to a selected linear input signal provides a square wave having the same frequency as the linear input signal. The modem, using a DC bias provided from the square-wave signal, is responsive to the square wave and linear input signals for providing a DC output having a magnitude proportional to the magnitude of the selected linear input signal.