Patent ID: 7643634

Claim:
An electronic component, comprising: an integrated circuit embodied on a single monolithic substrate and incorporating: a tuning circuit of the direct sampling type including mixed analog and digital circuitry configured to receive RF satellite digital television signals composed of several channels at a circuit input for direct sampling at RF and digital transposition to output several downconverted signals each associated with a different selected channel; and several channel decoding digital circuits connected at the outputs of the tuning circuit and each including digital circuitry to deliver respectively and simultaneously several streams of data packets corresponding to the different selected channels; wherein the analog circuitry of the tuning circuit is fabricated in a first portion of that single monolithic substrate and digital circuitry of the tuning circuit and the several channel decoding circuits are fabricated in a second portion of that single monolithic substrate; and a semiconducting barrier formed in the single monolithic substrate between the first portion and the second portion to insulate the analog circuitry in the first portion from noise on a supply voltage for the digital circuitry in the second portion; wherein the channels extend over a predetermined frequency span and the RF signals convey digital information coded by digital modulation, and wherein each channel decoding digital circuit comprises: a low pass digital decimator filter followed by an additional digital filter for eliminating information of adjacent channels, the additional digital filter having a cutoff frequency of the order of the frequency half-width of a channel; and a digital error correction stage for delivering a stream of data packets corresponding to the information conveyed by the channel being processed by the channel decoding module.