Patent ID: 7295645

Claim:
A digital receiver comprising: an analog to digital converter coupled to receive an analog signal and convert the analog signal to a digital signal, the converter having an analog to digital conversion ratio dependent on a reference voltage provided thereto; a power sensor coupled to the output of the analog to digital converter to provide a power sensor output responsive to the digital signal; a loop filter coupled to the power sensor and smoothing the output of the power sensor to provide a loop filter output; a reference voltage control responsive to the output of the loop filter to provide the reference voltage to the analog to digital converter; a demodulator coupled to the output of the analog to digital converter; and, a receiver mode control coupled to the output of the demodulator, an output of the receiver mode control providing a threshold signal output responsive to a mode of receiver operation sensed by the receiver mode control, the loop filter being responsive to the difference in the output of the power sensor and the threshold signal output.