Modulator-demodulator apparatus and system

Pulse or digital communications – Repeaters – Testing

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375121, H04B 138

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active

052590003

ABSTRACT:
In a MODEM having modulation and demodulation circuits and a circuit for controlling the modulation and demodulation, a modulator-demodulator apparatus includes a register for accepting a macro-instruction from an external source; a circuit for interpreting and executing the macro-instruction; and a circuit for outputting a response to the macro-instruction, whereby the MODEM is controlled in response to the macro-instruction accepted from the outside source. The modulator-demodulator apparatus is suitably integrated over a single semiconductor substrate.

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patent: 4912723 (1990-03-01), Verbanets, Jr.
Nagal et al "A Signal Processor For Voice Band Application" 1988 IEEE International Solid State Circuit Conf. pp. 260-261.
YM3418 MD96FX (9600 bps Fax Modem Lis) printed in Japan 1988 Jan.

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