Patent ID: 7324615

Claim:
A system for receiving and decoding a radio frequency time signal, said system comprising: an antenna for receiving a radio frequency time signal; a variable gain amplifier coupled to said antenna; a state variable bandpass filter coupled to said variable gain amplifier, where said state variable bandpass filter is tuned to the radio frequency time signal carrier frequency; a time signal detector for demodulating time information from the radio frequency time signal, said time signal detector coupled to said state variable bandpass filter; and a digital processor coupled to and controlling said variable gain amplifier and said state variable bandpass filter, said digital processor receiving the demodulated time information from said time signal detector, wherein said digital processor controls tuning of said state variable bandpass filter to the carrier frequency of the radio frequency time signal by auto-correlating the demodulated time information with a know time information format; and wherein said variable gain amplifier, said state variable bandpass filter, said time signal detector and said digital processor are fabricated on an integrated circuit die.