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. 06, 1976
Filed:
Oct. 29, 1974
Applicant:
Inventor:
Yukihiko Machida, Mitaku, JA;
Assignee:
Sony Corporation, Tokyo, JA;
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
H03K / ;
U.S. Cl.
CPC ...
329107 ; 325321 ; 328110 ; 328134 ; 329124 ;
Abstract
A reference carrier signal is combined with a phase modulated signal of the same basic frequency to generate an output signal the amplitude of which varies in accordance with the phase difference between the phase modulated signal and the reference carrier. The permissible modulation angle is increased by vectorally adding the phase modulated signal with a reference signal having a phase different from the comparison reference carrier. The vector sum signal is amplitude-limited so that the signal produced by the comparison will only be responsive to phase angle and not amplitude.