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:
Jul. 02, 1996
Filed:
Oct. 12, 1993
Applicant:
Inventor:
Hiroki Tsuda, Tokyo, JP;
Assignee:
NEC Corporation, , JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H03D / ; H03D / ;
U.S. Cl.
CPC ...
375327 ; 375329 ; 329307 ;
Abstract
In a PSK-modulating arrangement including a voltage controlled oscillator (VCO), a demodulator, a phase detector and a loop filter, a carrier phase lock detecting apparatus is equipped with the arrangement, the apparatus comprising a first multiplier for inversely modulating a demodulated signal by a reference carrier signal from the VCO, a second multiplier for multiplying the output of the first multiplier by an input PSK-modulated signal and a decision circuit for detecting carrier phase lock in response to the output of the second multiplier.