IC implementations of signal-processing systems: an overview

A short review of the principal analog MOS basic building blocks is followed by a discussion of several representative LSI signal-processing circuits that combine analog and digital functions on the same chip. An echo-canceller speech-synthesizer IC, character-recognition circuit for reading wands, and beam-former circuit are implemented with MOS technology and discussed in detail. An example of I/SUP 2/L technology is presented in the form of a data-transmission IC. The evolution toward more complex, dedicated, signal-processing devices is briefly discussed in terms of the technology and engineering requirements.