Single bit bandpass analog-to-digital converter

Details Single bit bandpass analog-to-digital converter Single bit bandpass analog-to-digital converter

1994-02-15

1996-11-12

Hoff, Marc S.

Coded data generation or conversion

Analog to or from digital conversion

Differential encoder and/or decoder

341172, H03M 302

Patent

active

055744524

ABSTRACT:
A single bit bandpass analog-to-digital converter has an analog summer, an analog bandpass filter, a single bit quantizer, and a single bit digital-to-analog converter connected in a loop. An input signal to the single bit filter is applied to a plus input terminal of the summer, and the output of the digital-to-analog converter is applied to a minus input terminal of the summer. The output signal from the single bit filter is taken from the output of the quantizer. The bandpass filter is preferably driven by a digital clock running at the same frequency as the quantizer and the digital-to-analog converter. This architecture reduces quantization noise within the passband at the possible expense of increasing it outside the passband. The passband is centered precisely on one-quarter of the clock frequency.

REFERENCES:
patent: 4999634 (1991-03-01), Brazdrum et al.
patent: 5027120 (1991-06-01), Thurston
patent: 5057839 (1991-10-01), Koch
patent: 5140325 (1992-08-01), Yu et al.
patent: 5148166 (1992-09-01), Ribner
patent: 5298900 (1994-03-01), Mauthe et al.
patent: 5305004 (1994-04-01), Fattaruso
patent: 5357252 (1994-10-01), Ledzius et al.
patent: 5442353 (1995-08-01), Jackson

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