Patent ID: 6323736
Filing Date: 2001-11-27
Classification: H01L,H03B,H03F,H03J,H03L

Abstract:
A method of calibrating a frequency adjustable oscillator circuit in an integrated circuit device, wherein the frequency adjustable oscillator circuit includes an inductor coupled in parallel to a plurality of multiple capacitance level capacitors, each multiple capacitance level capacitor having a plurality of steady-state capacitance levels, and wherein each multiple capacitance level capacitor is coupled to an associated and corresponding control signal, and wherein the capacitance level measured across the plurality of capacitors varies as a function of the corresponding control signal, the method comprising the steps of:a) tuning the oscillator circuit to a desired center frequency;b) measuring an actual center frequency generated by the oscillator circuit;c) comparing the actual center frequency measured in step (b) to the desired center frequency; andd) varying the control signals applied to the plurality of multiple capacitance level capacitors until the actual center frequency measured in step (b) is approximately equal to the desired center frequency of the oscillator circuit.