Circuit for PCM conversion of an analog signal, with improvement

Coded data generation or conversion – Converter compensation

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Details

341143, 341155, H03M 106, H03M 304, H03M 100

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active

052871061

ABSTRACT:
The circuit includes a filter to which an analog signal is applied, a quantizer driven by the filter, a sampler at a desired frequency driven by the quantizer and a PCM encoder driven by the sampler. The quantizer generates a quantize signal according to the received analog signal and further generates a difference signal according to the difference between a quantized signal and the analog signal. A feedback circuit feeds back the difference signal from the quantizer to a stage of the filter so that the overall transfer function from the input of the feedback circuit to the output of the filter is equivalent to a low pass filtering.

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1987 IEEE International Symposium on Circuits and Systems, Philadelphia, Pa., May 4th-7th, 1987, pp. 467-472, IEEE, New York, U.S.; A. Yukawa: "Constraints Analysis for Oversampling A-to-D Converter Structures on VLSI Implementation".
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