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:
Oct. 21, 1986
Filed:
Dec. 14, 1984
Masaharu Mori, Tokyo, JP;
Ryuichi Asai, Tokyo, JP;
Clarion Co., Ltd., Tokyo, JP;
Abstract
A PSK demodulator, by which a first output signal obtained from a local oscillator circuit working asynchronously with respect to the carrier phase of an inputted burst PSK signal and a second output signal shifted in phase by 90.degree. with respect to the first output signal are multiplied by the inputted burst PSK signal by means of a first multiplier and a second multiplier, respectively. Each of the output signals from the first and second multipliers are compared with a first reference voltage and a second reference voltage, which is lower than the first reference voltage. The output signals are classified into 4 sorts of level signals, those which are higher than the first reference voltage and those which are lower than the second voltage; and thus the inputted burst PSK signal is demodulated by using these 4 sorts of level signals.