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. 19, 1991
Filed:
Sep. 06, 1990
Applicant:
Inventor:
Paul Dent, Stehag, SE;
Assignee:
Ericsson GE Mobile Communication Holding, Inc., Paramus, NJ (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H03K / ; H03K / ;
U.S. Cl.
CPC ...
331 / ; 331 16 ; 331 25 ; 377 48 ; 377 52 ;
Abstract
In a phase locked loop having a variable divider, a dual modulus counter is used to provide the variable divider with selection signals. The variable divider is capable of providing an overall division ratio in increments of one over a contiguous range of values. The dual modulus counter includes a counter, a comparator and logic gates which generate selection signals that allow the variable divider to divide an input signal by at least division ratios R1 and R2. A phase locked loop utilizing the dual modulus counter is particularly well suited for use in a digital frequency synthesizer.