System and method for oscillator self-calibration using AC line frequency

A method for self-calibration of a radio frequency transmitter wherein said transmitter includes an oscillator having both an oscillator frequency and a desired operating frequency, and wherein said transmitter is powered by an AC power line and wherein said AC power line presents a line frequency, the method comprising the steps of:

• counting said oscillator frequency;
• counting said line frequency of said AC power line;
• comparing the counted oscillator frequency to the counted line frequency to produce a difference in frequency, wherein said difference in frequency indicates a deviation of said oscillator frequency from said desired operating frequency;
• and
• adjusting said oscillator frequency back to said desired operating frequency according to said difference in frequency.

A self-calibrating radio frequency transmitter wherein said transmitter includes an oscillator having both an oscillator frequency and a desired operating frequency, and wherein said transmitter is powered by an AC power line and wherein said AC power line presents a line frequency, comprising:

• means for counting said oscillator frequency;
• means for counting said line frequency from said AC power line;
• means for comparing the counted oscillator frequency to the counted line frequency to produce a difference in frequency, wherein said difference in frequency indicates a deviation of said oscillator frequency from said desired operating frequency;
• and
• means for adjusting said oscillator frequency back to said desired operating frequency according to said difference in frequency.