Digital-to-analog converter for bipolar signals

Details Digital-to-analog converter for bipolar signals Digital-to-analog converter for bipolar signals

1984-02-06

1984-12-25

Miller, C. D.

Communications: electrical

Audible indication

Percussion-type sound producer

340347CC, H03K 1302

Patent

active

044907141

ABSTRACT:
In a digital-to-analog converter for bipolar signals all the bits change when the signals pass through the zero level. This results in a poor signal-to-noise ratio owing the small signal and the large noise contribution by the switching transients. The invention proposes to add a digital number to or subtract it from the digital input signal as an offset. As a result of this, the switching point is shifted towards a higher amplitude, which improves the signal-to-noise ratio and the distortion in the case of digital audio signals.

REFERENCES:
patent: 4346368 (1982-08-01), Johnson
Siegel, "Understanding Digital Computers" .COPYRGT.1961, pp. 45-50.

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