Circuit and method for digitally measuring signal levels of PCM

Details Circuit and method for digitally measuring signal levels of PCM Circuit and method for digitally measuring signal levels of PCM

1977-03-04

1978-07-25

Stewart, David L.

Electricity: measuring and testing

Measuring, testing, or sensing electricity, per se

Frequency of cyclic current or voltage

324 76A, H04J 314

Patent

active

041031083

ABSTRACT:
A digital circuit for the level measurement of PCM signals representing an analogue signal and encoded in accordance with a predetermined companding law comprising a selector circuit having position 0-n for selecting integers between 0 - n; a sampling circuit for successively sampling the input PCM signal 2.sup.n times, n being determined by the selector circuit; a connector circuit for converting each of the samples to its normalized power representation and for computing the average power of the samples; and means for determining the signal level equivalent of said average power in a conventional representation of power levels.

REFERENCES:
patent: 3683115 (1972-08-01), Schellenberg
patent: 3798635 (1974-03-01), Candiani
patent: 3823269 (1974-07-01), Saito

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