Multiplexed digital/analog conversion of plural digital signals

Details Multiplexed digital/analog conversion of plural digital signals Multiplexed digital/analog conversion of plural digital signals

1976-07-26

1978-11-07

Sloyan, Thomas J.

Communications: electrical

Audible indication

Percussion-type sound producer

235 92CV, 235 92GT, 340347M, 340347SY, H03K 1302

Patent

active

041248457

ABSTRACT:
Plural digital signals are converted to plural analog signals through a plurality of sample and hold circuits, there being one for each of the desired conversions, which sequentially sample a periodic signal on a repetitive basis in response to a sample control signal, and a plurality of digital counters, each being associated with a different one of the sample and hold circuits for receiving one of the digital signals and providing a digital count of clock pulses indicative thereof when enabled to provide the sample control signal upon the completion of its count, with each enabling period being initiated at the same cyclical point of the periodic signal and wherein the number of clock pulses generated in one cycle of the periodic signal is equal to the maximum count for the digital counters.

REFERENCES:
patent: 3646545 (1972-02-01), Naydan et al.
patent: 3654560 (1972-04-01), Cath et al.
patent: 3743939 (1973-07-01), Munt
patent: 3993992 (1976-11-01), Zwack
patent: 3993993 (1976-11-01), Griffin
Bares et al, COMBINED ADC-DAC, IBM Technical Disclosure Bulletin, vol. 10, No. 9, 2/1968, pp. 1372,1373.

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