Digital-analog converter

Details Digital-analog converter Digital-analog converter

1974-07-15

1977-01-25

Sloyan, Thomas J.

Communications: electrical

Audible indication

Percussion-type sound producer

1791702, H03K 1302

Patent

active

040054063

ABSTRACT:
A digital-analog converter is provided wherein a digital signal from an analog-digital converter is compared with a predetermined value and is suppressed to zero if it is smaller than the predetermined value, the resulting digital signal being converted into a corresponding analog signal. The converter is useful particularly in communication networks, serving to improve communication quality in terms of noise by suppressing input signals of amplitudes below a certain level. This invention avoids the need for an analog delay circuit as required by a conventional analog-type device.

REFERENCES:
patent: 3487304 (1969-12-01), Kennedy
patent: 3540037 (1970-11-01), Ottesen
patent: 3894200 (1975-07-01), Campanella et al.
Analog Devices, Inc., "Analog-Digital Conversion Handbook," 6/72, pp. I-106, I-107, II-1 to II-10.
Analog Devices, Inc., "Analog-Digital Conversion Handbook," 6/1972, pp. II-4 to II-9, II-122, II123.

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