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:
Feb. 07, 1978
Filed:
Apr. 01, 1977
Andrew G Dingwall, Bridgewater, NJ (US);
Bruce D Rosenthal, Mountain View, CA (US);
RCA Corporation, New York, NY (US);
Abstract
The VCO circuit includes means for varying the potential across an inverting stage of a ring oscillator for changing its frequency of oscillation, while maintaining the quiescent point of the stage output centered between the two operating voltages powering the circuit. A current source is connected between the more positive of the two operating voltages and the positive voltage terminal of the stage and a current sink is connected between the more negative of the two operating voltages and the negative voltage terminal of the stage. The current supplied by the current source and the current drawn by the current sink are proportional to an input control voltage and are equal in magnitude. The oscillator stage is biased in the linear portion of its transfer characteristic and provides a conduction path between the current source and the current sink.