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:
Aug. 21, 1990
Filed:
Dec. 27, 1989
Applicant:
Inventor:
David C Babin, Austin, TX (US);
Assignee:
Motorola, Inc., Schaumburg, IL (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
H03L / ;
U.S. Cl.
CPC ...
331 16 ; 331 / ; 331 25 ;
Abstract
A phase locked loop for providing a programmable frequency output signal with reduced phase-frequency lock time. A phase detector detects a phase difference between a reference frequency divided by a first number, and a frequency of the output signal divided by a second number. First and second counters receive the first and the second input numbers to divide a respective frequency. Whenever an input number is loaded, a load signal resets the phase detector and causes each counter to be loaded, which reduces the lock time of the loop.