Higher order interpolation for digital-to-analog conversion

Details Higher order interpolation for digital-to-analog conversion Higher order interpolation for digital-to-analog conversion

1985-01-16

1986-06-03

Miller, Charles D.

Communications: electrical

Audible indication

Percussion-type sound producer

364723, H03M 166, G06F 738

Patent

active

045932719

ABSTRACT:
Digital signals are processed by a first accumulator to generate most significant bits which represent the signal to be converted but with truncation noise. The error signals from the first accumulator are processed by a second accumulator to generate a second set of most significant bits which are used to remove the truncation noise. The most significant bits from the second accumulator are converted to analog form, differentiated and then combined with the most significant bits from the first accumulator after being converted from digital to analog form. The combined signal is then amplified and filtered.

REFERENCES:
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patent: 4079373 (1978-03-01), Brown
patent: 4301446 (1981-11-01), Petit
patent: 4467316 (1984-08-01), Musmann
patent: 4528551 (1985-07-01), Agrawal
"Interpolative Digital-to-Analog Converters", G. R. Ritchie et al, IEEE Trans. on Communications, vol. Com-22, No. 11, Nov. 74, pp. 1797-1806.
"The Structure of Quantization Noise from Sigma-Delta Modulation" by J. C. Candy et al, IEEE Trans. on Com, vol. Com-29, No. 9, Sep. 1981, pp. 1317-1323.
"A Voiceband Codec with Digital Filtering" by J. C. Candy et al, IEEE Trans. on Comm, vol. Com-29, No. 6, Jun. 1981, pp. 815-830.

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