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. 19, 1985
Filed:
Dec. 22, 1982
Applicant:
Inventors:
Buntaro Sawa, Sagamihara, JP;
Naoto Honda, Hino, JP;
Assignee:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H03L / ;
U.S. Cl.
CPC ...
331-2 ; 331 25 ; 331 47 ;
Abstract
A signal regeneration circuit using first and second phase-locked loop (PLL) circuits each having a phase comparator, a loop filter and a voltage controlled oscillator (VCO) in which the phase of an input signal is shifted by a desired amount. The first PLL operates as an input signal frequency averaging means, and the second PLL operates to satisfy the final performance as a signal regenerative circuit based on the output of the VCO in the first PLL, thereby producing as a regenerative signal the output of the VCO in the second PLL. Thus, this signal regeneration circuit can regenerate a clear signal having no noise from an unclear input signal deeply immersed in noise.