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. 13, 1999
Filed:
Sep. 29, 1997
Kenneth Charles Barnett, West Palm Beach, FL (US);
Harold Michael Cook, Boynton Beach, FL (US);
Motorola, Inc., Schaumburg, IL (US);
Abstract
A VCO (Voltage Controlled Oscillator) (10) operates in a phase-locked loop at a desired frequency. One input to the VCO is a variable control signal (24) that holds the VCO at the desired frequency. Another input is a bias input (40) that changes the operating point of a transistor (34) in the VCO and also tends to change the VCO's frequency. The value of the variable control signal (24) is sensed while the bias input (40) is changed until a desired, minimum value of the control signal is sensed. The value of the bias input at that point is held constant while operating the VCO at the desired frequency and with minimal side band noise.