Patent ID: 7145410

Claim:
A wireless communication terminal comprising a voltage controlled oscillator comprising: an active device for producing a power gain; a first variable capacitance, operably coupled to the active device, providing a variable capacitance value based on a voltage applied on a steering line; and a feedback network comprising a resonator that is operably coupled to an output of the active device and that is coupled in parallel to the first variable capacitance and a capacitor in series with the first variable capacitance, for feeding power back to an input of the active device to sustain oscillations; and wherein the voltage controlled oscillator further includes a second variable capacitance which is operably coupled to receive a control voltage from the steering line via an isolator inductor common to the first variable capacitance, wherein the second variable capacitance is coupled in series between the resonator and the active device and is not directly connected to the first variable capacitance.