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:
Jan. 15, 1985
Filed:
Nov. 16, 1981
Mark G Call, Boulder, CO (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
A voltage-controlled oscillator (VCO) comprises a current controlled oscillator (ICO) and control circuitry which independently adjusts the gain (K.sub.v) and free-run or center frequency of the VCO. The control circuitry includes a first current source selected to set the free-run frequency of the VCO and a second current source selected to set the gain (K.sub.v) of the VCO. The current sources are coupled to a common node in a summing/difference configuration. The controlled current generated from the summing/difference configuration is delivered into the ICO. Independent current mirrors are utilized to supply controlled current into the node of the summing/difference configuration.