Patent ID: 8130051

Claim:
A method comprising: for a voltage controlled oscillator (VCO) comprising a variable capacitor, controlling linearity of a relationship between a control voltage of said VCO and a capacitance of said variable capacitor by controlling a plurality of bias voltages communicatively coupled to a corresponding plurality of bias terminals of said variable capacitor, wherein: said control voltage is applied to a terminal of said variable capacitor; said control voltage establishes an upper boundary for a first portion of said plurality of bias voltages; said control voltage establishes a lower boundary for a second portion of said plurality of bias voltages; said plurality of bias voltages are generated via a resistive ladder; a first endpoint of said resistive ladder is coupled to a first supply voltage; a second endpoint of said resistive ladder is coupled to a second supply voltage; and said control voltage is applied to an interior point of said resistive ladder.