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. 10, 1987
Filed:
Dec. 06, 1985
Applicant:
Inventors:
Botaro Hirosaki, Tokyo, JP;
Takashi Kuriyama, Tokyo, JP;
Assignee:
NEC Corporation, Tokyo, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H03L / ;
U.S. Cl.
CPC ...
331 / ; 375120 ;
Abstract
A phase-locked loop is supplied with a random two-level code sequence derived from a clock pulse having a frequency f.sub.0 to generate a local clock pulse which is in phase and frequency synchronization with the clock pulse. The local clock pulse is supplied by means of a voltage control oscillator controlled in accordance with a phase difference signal and a phase supplement signal. The phase difference signal is indicative of the difference in phase between an input signal and a discrimination signal. The phase supplement signal is derived by a signal generator responsive to the phase difference signal and the local clock pulses.