Bandpass delta-sigma modulator

Details Bandpass delta-sigma modulator Bandpass delta-sigma modulator

2011-08-23

2011-08-23

Lauture, Joseph (Department: 2819)

Coded data generation or conversion

Analog to or from digital conversion

Differential encoder and/or decoder

C341S155000

Reexamination Certificate

active

08004437

ABSTRACT:
A bandpass delta-sigma modulator is formed to include a bandpass filtering circuit that bandpass filters an input signal. An analog-to-digital converter (ADC) receives output of the bandpass filtering circuit and generates an output quantization code. A digital filter receives the output quantization code. A digital-to-analog converter (DAC) receives output of the digital filter and scales the value of the output quantization code by DAC coefficients to the bandpass filtering circuit.

REFERENCES:
patent: 5442353 (1995-08-01), Jackson
patent: 6864818 (2005-03-01), Hezar
patent: 2005/0068213 (2005-03-01), Fontaine et al.
Y. Chen, “Bandpass Delta-Sigma Modulator with a Digitally-Assisted Loop Filter,” Sep. 2009.

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