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:
Apr. 22, 1986
Filed:
Jun. 28, 1984
Applicant:
Inventor:
Eric Trelewicz, Mesa, AZ (US);
Assignee:
Motorola, Inc., Schaumburg, IL (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H03L / ;
U.S. Cl.
CPC ...
331 / ; 328 14 ; 331 18 ; 331 25 ; 331173 ;
Abstract
An apparatus and method is disclosed for operating a modulus control loop of an LSI a phase locked loop integrated circuit (or descrete equivalent) and a dual modulus prescaler at higher frequencies. This is accomplished through the use of a flip flop whose input is the modulus control output from the synthesizer IC and whose clock input is provided by the output of the prescaler. This greatly extends the time available to shift the prescaler modulus control insuring that the control signals will not be missed and increasing the available frequencies that the modulus control loop may operate at.