Patent ID: 7804369

Claim:
An integrated frequency calibration architecture comprising: a radio frequency (RF) module in communication with a digital signal processor (DSP) module, wherein the RF module is located on an integrated circuit; a voltage controlled oscillator (VCO) on the RF module, wherein the VCO is configured to have a normal operation mode and a frequency calibration mode; a phase lock loop (PLL) on the RF module, wherein the PLL provides a VCO input voltage to the VCO based on a scaled reference frequency during the frequency calibration mode; a VCO tuning circuit comprising a digital-to-analog converter (DAC), wherein the DAC adjusts to the VCO input voltage during the frequency calibration mode, and wherein the DAC connects to the VCO during the normal operation mode; and a switch configured to switch the VCO between the normal operation mode and the frequency calibration mode.