H - Electricity – 02 – M
Patent
H - Electricity
02
M
H02M 3/02 (2006.01) H03M 3/04 (2006.01)
Patent
CA 2052720
RD-20742 PLURAL-ORDER SIGMA-DELTA ANALOG-TO-DIGITAL CONVERTERS USING BOTH SINGLE-BIT AND MULTIPLE-BIT QUANTIZERS ABSTRACT OF THE DISCLOSURE An oversampling converter of a type using a plural-order, plural-stage sigma-delta modulator, the output signal to the decimating filter of which modulator has the quantization noise contribution of a number of its plurality of stages suppressed therein, uses single-bit quantization in those stages, and the modulator uses single-bit quantization in those stages. Those stages each employ digital-to-analog converters with single-bit resolution in their feedback connections to avoid non-linearity problems. Another sigma-delta converter stage, the quantization noise of which appears in substantial amount in the converter output signal to the decimating filter, uses quantization having multiple- bit resolution to help increase the resolution of the oversampling converter overall. This other sigma-delta converter stage also employs a digital-to-analog converter with single-bit resolution in its feedback connection in order to avoid non-linearity problems, with additional circuitry being used to compensate for the digital- to-analog converter having single-bit, rather than multiple-bit, resolution.
Company General Electric
Craig Wilson And Company
LandOfFree
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