Patent ID: 7106388
Filing Date: 2006-09-12
Classification: H03D,H03J,H04N

Abstract:
1. An integrated digital IF demodulator comprising: a substrate; 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; a low pass filter disposed on the substrate having an input coupled to a second output of the VIF demodulator and Nyquist 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.