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:
Mar. 11, 1986
Filed:
Aug. 30, 1984
Applicant:
Inventors:
Hidehito Aoyagi, Tokyo, JP;
Botaro Hirosaki, Tokyo, JP;
Assignee:
NEC Corporation, Tokyo, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H03D / ; H03D / ;
U.S. Cl.
CPC ...
329 50 ; 329110 ; 329122 ; 329135 ; 375 39 ; 375 81 ; 455214 ; 455337 ;
Abstract
In order to establish accurate sample timing in a digital demodulator which forms part of an orthogonally multiplexed parallel data transmission system, two second-order PLLs are arranged after a demodulating section of the digital demodulator so as to receive baseband signals of corresponding pilot channels. The two second-order PLLs each includes an integrator. These integrators apply the outputs thereof to a subtracter which applies the subtraction result to a voltage-controlled oscillator in order to establish the accurate sample timing.