Pulse code modulation circuit

Details Pulse code modulation circuit Pulse code modulation circuit

1991-08-29

1993-08-24

Kuntz, Curtis

Pulse or digital communications

Repeaters

Testing

381 32, H04B 1404

Patent

active

052395588

ABSTRACT:
A pulse code modulation circuit comprises a circuit for converting an input analog signal into a digital signal; processing circuit including a plurality of memories, each of which is a memory whose contents can be freely rewritten, for storing different PCM coding rules for pulse-code modulation, respectively, and for performing on an input signal applied thereto pulse-code modulation according to a selected one of the PCM coding rules stored in the memories, switching circuit provided between the converting circuit and the processing circuit for applying the digital signal converted by the converting circuit as the input signal to a selected one of the memories in the processing circuit so that the converted digital signal is subjected to pulse-code modulation based on the selected one of the PCM coding rules; and a controlling circuit for controlling the switching circuit in accordance with a level of an output signal of the processing circuit so that the memory to which the digital signal is applied is selected in accordance with the level of the output signal of the processing circuit.

REFERENCES:
patent: 4464683 (1984-08-01), Thompson
patent: 4528689 (1985-07-01), Katz
patent: 4540973 (1985-09-01), Grallert

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