Patent ID: 8169270

Claim:
An oscillator comprising: a first oscillating node; a second oscillating node; a first plurality of first tuning capacitor elements, wherein each first tuning capacitor element in a first state provides a first capacitance between the first and second oscillating nodes, and wherein each first tuning capacitor element in a second state provides substantially no capacitance between the first and second oscillating nodes; a second plurality of second tuning capacitor elements, wherein each second tuning capacitor element in a first state provides a second capacitance between the first and second oscillating nodes, wherein each second tuning capacitor element in a second state provides substantially no capacitance between the first and second oscillating nodes, wherein the second capacitance is smaller than the first capacitance; and an amount of capacitor bank selection logic coupled to both the first plurality of first tuning capacitor elements and the second plurality of second tuning capacitor elements, wherein the amount of capacitor bank selection logic generates a first capacitor bank code and a second capacitor bank code in response to a difference between an oscillation frequency of the oscillator and a target oscillation frequency.