Abstract
The application of single-bit digital signal processing to mechanical control systems has already been proposed by the authors. Multibit A/D converters have been improved to a high level. But it is difficult to improve high-resolution A/D by the latest semiconductor technologies. A single-bit digital signal can be generated by a delta-sigma modulator. Single-bit digital signal has a small quantized error at low frequency. Then with this single-bit digital signal processing, high resolution on controlling such a narrow-bandwidth mechanical system will be realized. In this paper, resolution of analog, multibit, and single-bit control systems is estimated via simulation. According to the results of simulations, a single-bit control system has a higher resolution than a multibit system under conditions of equal bit rates. © 1999 Scripta Technica, Electr Eng Jpn, 128(4): 94–101, 1999
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