Sigma-delta modulator for D-to-A converter

Details Sigma-delta modulator for D-to-A converter Sigma-delta modulator for D-to-A converter

1988-04-18

1990-02-13

Shoop, Jr., William M.

Coded data generation or conversion

Analog to or from digital conversion

Differential encoder and/or decoder

341 77, 341110, 341146, H03M 302

Patent

active

049010778

ABSTRACT:
A digital-to-analog converter includes a sampled data sigma-delta modulator to resample and coarsely quantize the digital samples to be converted. The coarsely quantized samples are converted to sequences of pulses which are applied to a pulse sensitive analog integrator to develop analog representations of the digital signal.

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Candy, "Decimation for Sigma Delta Modulation", IEEE Transactions On Comm., vol. COM-34, No. 1, Jan. 86, pp. 72-76.
Candy et al., "A Voiceband Codec with Digital Filtering," IEEE Trans. on Comm., vol. COM-29, No. 6, Jun. 81, pp. 815-830.
Candy, "A Use of Double Integration in Sigma Delta Modulation," IEEE Trans. on Comm., vol. COM-33, No. 3, Mar. 85, pp. 249-258.
Misawa et al., "Simple Chip Per Channel Codec with Filters Utilizing .DELTA.-.epsilon. Modulation," IEEE, JSSC, vol. SC-16, No. 4, Aug. 1981, pp. 333-340.
Candy et al., "Double Interpolation for Digital-to-Analog Conversion," IEEE Transactions on Communications, vol. COM-34, No. 1, Jan. 86, pp. 77-81.

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