Back-gate coupling voltage control oscillator

Details Back-gate coupling voltage control oscillator Back-gate coupling voltage control oscillator

2007-02-05

2009-06-09

Cho, James (Department: 2819)

Oscillators

With frequency adjusting means

With voltage sensitive capacitor

C331S03600C, C331S1170FE, C331S167000

Reexamination Certificate

active

07545230

ABSTRACT:
A voltage control oscillator (VCO) includes a VCO circuit and a back-gate coupling circuit, wherein the VCO circuit includes at least a first transistor, a second transistor and a resonant cavity formed by an inductor and a capacitor. The back-gate coupling circuit is formed by a plurality of capacitors and a plurality of resistors. In the embodiments of the present invention, the capacitors are coupled to the back-gate terminals of the first transistor and the second transistor, so as to reduce the power consumption and the phase noise of the VCO.

REFERENCES:
patent: 7342462 (2008-03-01), Chen
patent: 2002/0145481 (2002-10-01), Murgulescu
patent: 2003/0042989 (2003-03-01), Sakurai
patent: 2005/0046494 (2005-03-01), Lee et al.
patent: 2007/0257742 (2007-11-01), Cha et al.
patent: 2008/0042769 (2008-02-01), Berens
Article titled “A 5.2GHz Low Voltage and Low Power Differential Colpitts VCO” jointly authored by Lee et al., Cross Strait Tri-Regional Radio Science and Wireless Technology Conference 2006, Department of Electronic Engineering National Taiwan University of Science and Technology, Taipei, Taiwan (R.O.C.), pp. 33-36.

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