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:
Feb. 01, 1977
Filed:
Apr. 17, 1975
Yasunobu Kuniyoshi, Tokyo, JA;
Kazuo Yamagiwa, Tokyo, JA;
Sony Corporation, Tokyo, JA;
Abstract
A phase detector comprising a first differential amplifier for receiving a first input signal and having an output circuit which produces an output that is a direct function of the first input signal. An actuable second differential amplifier receives a second input signal and includes an output circuit for producing an output signal which is proportional to the phase difference between the first and second input signals. The second differential amplifier is coupled to the first differential amplifier output circuit so as to be actuated by the output produced by the output circuit and to thereby produce an output signal representing the phase difference between the second input signal and the output supplied by the first differential amplifier output circuit. The output produced by the first differential amplifier output circuit is supplied as a differential amplifier current to the second differential amplifier. Hence, in one embodiment, the second differential amplifier includes common-connected stages connected in differential configuration, the common connection being coupled to the first differential amplifier output circuit.