Patent ID: 7545230

Claim:
A voltage control oscillator, comprising: a voltage control oscillator circuit, comprising at least a first transistor, a second transistor and a resonant cavity, wherein the resonant cavity comprises at least an inductor and a capacitor, and the voltage control oscillator circuit further comprising: a first capacitor, disposed between a first output terminal of the voltage control oscillator circuit and a back-gate terminal of the second transistor; a second capacitor, disposed between a second output terminal of the voltage control oscillator circuit and a back-gate terminal of the first transistor; and a third capacitor, disposed between the back-gate terminal of the first transistor and the back-gate terminal of the second transistor; and a back-gate coupling circuit, comprising at least a plurality of capacitors and a plurality of resistors, wherein the capacitors are respectively coupled to the back-gate terminals of the first transistor and the second transistor for reducing the power consumption and the phase noise of the voltage control oscillator.