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. 21, 1992
Filed:
Sep. 30, 1991
Applicant:
Inventors:
Phuc C Pham, Chandler, AZ (US);
Carl Denig, Mesa, AZ (US);
Assignee:
Motorola, Inc., Schaumburg, IL (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H03C / ;
U.S. Cl.
CPC ...
3311 / ; 3311 / ;
Abstract
A voltage controlled oscillator circuit has been provided that allows for varying the center frequency of oscillation through an applied voltage signal (V.sub.F). Further, the center frequency of oscillation can be fine tuned around the center frequency via a modulation signal (S.sub.M). The voltage controlled oscillator circuit utilizes a negative resistance technique for oscillation and includes an output amplifier whose output resistance can be adjusted to match the input impedance of another circuit for maximum drive capability.