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:
Oct. 09, 2007
Filed:
Oct. 14, 2005
Sriram S. Kalpat, Austin, TX (US);
Leo Mathew, Austin, TX (US);
Mohamed S. Moosa, Round Rock, TX (US);
Michael A. Sadd, Austin, TX (US);
Hector Sanchez, Cedar Park, TX (US);
Sriram S. Kalpat, Austin, TX (US);
Leo Mathew, Austin, TX (US);
Mohamed S. Moosa, Round Rock, TX (US);
Michael A. Sadd, Austin, TX (US);
Hector Sanchez, Cedar Park, TX (US);
Freescale Semiconductor, Inc., Austin, TX (US);
Abstract
A voltage controlled oscillator (VCO) has a plurality of series-connected inverters. Within each inverter a first transistor has a first current electrode coupled to a first power supply voltage terminal, a second current electrode, a first control electrode coupled to an output terminal of another inverter of the plurality of series-connected inverters, and a second control electrode for receiving a first bias signal. A second transistor has a first current electrode coupled to the second current electrode of the first transistor, a second current electrode coupled to a second power supply voltage terminal, and a first control electrode coupled to the first control electrode of the first transistor. The second control electrode of the first transistor of each inverter receives a same or separate analog control signal to adjust the threshold voltage of the first transistors thereof to affect frequency and phase of the VCO's signal.