Method of and system for analog/digital conversion

Details Method of and system for analog/digital conversion Method of and system for analog/digital conversion

1979-09-11

1982-01-12

Sloyan, Thomas J.

Communications: electrical

Audible indication

Percussion-type sound producer

340347M, 375 25, H03K 1302

Patent

active

043108300

ABSTRACT:
To convert a sample of an amplitude-modulated voltage wave into binary pulses, the sample is simultaneously compared in two coders with two sets of threshold voltages of positive and negative polarity, respectively. Either one of the two coders yields in unbroken succession of pulses, having the same polarity as the sample, whereas the other coder produces a combination of both positive and negative pulses. Following inversion of the pulses issuing from one coder, and upon suppression of the pulses of one polarity (e.g. negative), the two pulse trains are combined into a series of bit groups each representing the absolute amplitude value of a respective sample. The final step in the processing of any sample is the generation of a sign bit in accordance with the polarity of the unipolar pulse train emitted by one of the coders; this sign bit is then transposed to the beginning of the corresponding group of amplitude bits.

REFERENCES:
patent: 3736586 (1973-05-01), Donjon

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