Sigma-delta conversion with analog, nonvolatile trimmed quantized feedback

Sigma-delta conversion with analog, nonvolatile trimmed quantized feedback

An Nth-order sigma-delta analog-to-digital converter (ADC) system having multilevel quantized feedback. A multilevel quantized feedback stage incorporates a multibit, current-mode digital-to-analog converter (DAC). In one embodiment, reference current sources for the DAC may comprise a plurality of...

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Hauptverfasser: MCDANIEL BART R, SMITH MALCOLM H
Format: Patent
Sprache:eng
Schlagworte:
BASIC ELECTRONIC CIRCUITRY
CODE CONVERSION IN GENERAL
CODING
DECODING
ELECTRICITY
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creator MCDANIEL BART R
SMITH MALCOLM H
description An Nth-order sigma-delta analog-to-digital converter (ADC) system having multilevel quantized feedback. A multilevel quantized feedback stage incorporates a multibit, current-mode digital-to-analog converter (DAC). In one embodiment, reference current sources for the DAC may comprise a plurality of floating-gate MOS transistors so that analog nonvolatile precision linearity trimming of the feedback DAC may be accomplished. Calibration of the DAC may be performed at a relatively low refresh rate, for example, only at instances when the sigma-delta ADC system is activated.
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subjects BASIC ELECTRONIC CIRCUITRY
CODE CONVERSION IN GENERAL
CODING
DECODING
ELECTRICITY
title Sigma-delta conversion with analog, nonvolatile trimmed quantized feedback
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