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. 17, 2006
Filed:
Aug. 19, 2003
Daniel E. Brueske, Fort Lauderdale, FL (US);
David B. Harnishfeger, Chandler, AZ (US);
Stephen T. Machan, Oakland Park, FL (US);
Daniel E. Brueske, Fort Lauderdale, FL (US);
David B. Harnishfeger, Chandler, AZ (US);
Stephen T. Machan, Oakland Park, FL (US);
Freescale Semiconductor, Inc., Austin, TX (US);
Abstract
A voltage controlled oscillator (VCO) for use in a personal area network synthesizer includes a delay cell (), a first current amplifier () for amplifying an input current, a resister capacitor (RC) tuning network () for varying the amount of amplification and delay of an output of the first current amplifier. A second current amplifier () is then used for amplifying an output current from the RC tuning network. The invention includes a unique composite voltage variable capacitor (CVVC) () for precisely tuning the amount of delay presented by the delay cell. The unique topology of the delay cell () allows it to be readily used in voltage controlled oscillators (VCOs) operable at frequencies above 1 GHz.