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:
Nov. 25, 1986
Filed:
Dec. 24, 1985
Applicant:
Inventors:
Assignee:
Fujitsu Limited, Kawasaki, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H03L / ;
U.S. Cl.
CPC ...
331-2 ; 331 14 ; 331 25 ; 455343 ;
Abstract
A frequency synthesizer having an intermittently operated PLL circuit in which power is intermittently applied to a prescaler to reduce power consumption. The PLL circuit is operated such that fluctuations in the frequency synthesizer output frequency do not occur. This stability in the output frequency results from selectively providing signals to the phase comparator within the PLL circuit only during a time period beginning after power is applied to the prescaler and ending before power is removed from the prescaler.