Signal modulated voltage controlled oscillator system

Details Signal modulated voltage controlled oscillator system Signal modulated voltage controlled oscillator system

2007-11-20

2007-11-20

Kinkead, Arnold (Department: 2817)

Oscillators

Solid state active element oscillator

Transistors

C331S1170FE, C331S167000, C331S17700V, C331S179000

Reexamination Certificate

active

11048151

ABSTRACT:
Improved voltage controlled oscillator (VCO) circuits are disclosed. A symmetrical voltage controlled oscillator (VCO) system according to the embodiments of the present invention comprises a frequency tuning circuit containing one or more varactors for receiving a predetermined tuning signal and a frequency tuning bias signal for altering capacitances of the varactors, a modulation circuit coupled in parallel with the frequency tuning circuit containing one or more varactors for modulating one or more outputs, and a core circuit coupled in a parallel with the tuning circuit and the modulation circuit for providing an oscillation mechanism, wherein the core circuit has an inductance module coupled in a parallel fashion with the frequency tuning circuit and the modulation circuit, wherein circuit elements of the VCO system are symmetrically arranged for increasing oscillation efficiency thereof and the varactors are tuned to deliver the output at an output frequency.

REFERENCES:
patent: 5434543 (1995-07-01), Brilka et al.
patent: 6806785 (2004-10-01), Traub
patent: 6972635 (2005-12-01), McCorquodale et al.
patent: 7005936 (2006-02-01), Tanzawa
patent: 2006/0028281 (2006-02-01), Sze et al.
patent: 2006/0028283 (2006-02-01), Sze et al.
U.S. Appl. No. 11/420,118, filed May 2006, Sze et al.

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