Patent ID: 7106388

Claim:
An integrated digital IF demodulator comprising: a substrate; an analog VGA disposed on the substrate coupled to an analog IF input; an ADC disposed on the substrate having its input coupled to an output of the analog VGA; an AGC Peak detection circuit disposed on the substrate having its input coupled to an output of the ADC; a first DAC disposed on the substrate having its input coupled to an output of the AGC Peak detection circuit and an output of the first DAC coupled to a control signal input of the analog VGA; a VIF demodulator and Nyquist filter disposed on the substrate having an input coupled to the output of the AGC peak detection circuit; an AFT circuit disposed on the substrate having an input coupled to the VIF demodulator and Nyquist filter input; a second DAC disposed on the substrate having an input coupled to an output of the AFT circuit; a low pass filter disposed on the substrate having an input coupled to a second output of the VIF demodulator and Nyquist filter; a sync detection and AGC circuit disposed on the substrate having an input coupled to an output of the low pass filter; a digital VGA disposed on the substrate having an input coupled to the second output of the VIF demodulator and Nyquist filter and a control signal input coupled to an output of the sync detection and AGC circuit; a third digital to analog converter disposed on the substrate having an input coupled to an output of the digital VGA; a band pass filter disposed on the substrate having an input coupled to the second output of the VIP demodulator and Nyquist filter; and a FM demodulator disposed on the substrate having an input coupled to an output of the band pass filter; and a fourth DAC disposed on the substrate having an input coupled to an output of the FM demodulator.