(b+a)-Bit D/A converter with b-bit auxiliary D/A converter

Communications: electrical – Audible indication – Percussion-type sound producer

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375103, H03K 1302

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active

043062229

ABSTRACT:
A digital-to-analog converter is described for converting (b+a)-bit code words into an analog signal by means of a b-bit auxiliary digital-to-analog converter. In order to reduce the quantizing noise introduced by the indispensible quantizing of the (b+a)-bit code words for obtaining the b-bit code words these (a+b)-bit code words are applied to an integrating network which has its output connected to an amplitude-limiting device which brings the integrated signal in the signal range of the auxiliary-D/A converter. The output signal of the amplitude-limiting device is now quantized and this quantizing signal is applied to the auxiliary D/A converter which produces analog output signal samples which are applied to, possibly, an analog output filter through a cascade arrangement of an amplitude-restorer and a difference network.
The (b+a)-bit code words are assumed to occur with a frequency which is higher than the Nyquist sampling frequency associated with the analog signal represented by these (b+a)-bit code words.

REFERENCES:
patent: 3560957 (1971-02-01), Miura
patent: 3893102 (1975-07-01), Candy
patent: 3987436 (1976-10-01), Candy
patent: 4006475 (1977-02-01), Candy
patent: 4079373 (1978-03-01), Brown
patent: 4131764 (1978-12-01), Claasen
Ritchie, "IEEE Transactions on Communications" vol. COM-22, No. 11, Nov. 1974, pp. 1797-1806.
Oppenheim, "Digital Signal Processing", 1975, pp. 413-418.
Crochiere, "IEEE Transactions on Acoustics, Speech and Signal Processing", vol. ASSP-23, Oct. 1975, pp. 444-456.
Crochiere, "IEEE Transactions on Acoustics, Speech and Signal Processing", vol. ASSP-24, Aug. 1976, pp. 296-311.
Bellanger "IEEE Trans. on Acoustics, Speech and Signal Processing", vol. ASSP-25, Aug. 1977, pp. 344-346.

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