Adaptive Delta-Sigma Modulation for Enhanced Input Dynamic Range
نویسندگان
چکیده
منابع مشابه
Adaptive Delta-Sigma Modulation for Enhanced Input Dynamic Range
An adaptive delta-sigma modulator of 1st order with one-bit quantization is presented. Adaptation is instantaneous and based on an exponential law. The feedback signal is a multibit discrete-level signal generated by a digital-to-analog converter (DAC). Compared to a nonadaptive delta-sigma modulator of 1st order, the input dynamic range is significantly enhanced. The gain in dynamic range is 6...
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A method for improving the signal-to-noise ratio (SNR) of sigma–delta modulators with one-bit quantization is presented. The two-level feedback signal of a standard sigma–delta modulator is replaced by a multilevel signal, which is a superposition of two parts. One part ( ) represents a rough estimate of the instantaneous amplitude of the input signal (prediction signal), and the other ( ) is t...
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ژورنال
عنوان ژورنال: EURASIP Journal on Advances in Signal Processing
سال: 2006
ISSN: 1687-6180
DOI: 10.1155/2008/439203