Patent ID: 8306491

Claim:
A system comprising: a mixer to receive a radio frequency (RF) signal and to provide an intermediate frequency (IF) signal according to a mixing signal; a controlled oscillator to generate the mixing signal and including: a load capacitor formed of a first capacitor bank and a second capacitor bank, the first capacitor bank and the second capacitor bank having different weighting schemes; and a controller to control the load capacitor, wherein the controller is to determine and store a calibration value in a non-volatile memory, the calibration value corresponding to a value of bits to control the second capacitor bank corresponding to a frequency range of a smallest controllable portion of the first capacitor bank, the calibration value obtained by calibrating the first capacitor bank, including applying a first control word to the first capacitor bank and measuring a first frequency of the controlled oscillator, adjusting a least significant bit (LSB) of the first control word, applying the adjusted first control word to the first capacitor bank and measuring a second frequency of the controlled oscillator, determining a frequency range corresponding to the LSB of the first control word based on a difference between the first and second frequency, applying the first control word to the first capacitor bank, iteratively adjusting a LSB of a second control word that controls the second capacitor bank, incrementing a count, and measuring a third frequency of the controlled oscillator until the third frequency is greater than the second frequency.