Integrated analog-to-digital converter

Details Integrated analog-to-digital converter Integrated analog-to-digital converter

1987-06-23

1990-06-26

Shoop, Jr., William M.

Coded data generation or conversion

Analog to or from digital conversion

Differential encoder and/or decoder

3647241, 375 27, 375 28, 375 33, H03M 302

Patent

active

049375776

ABSTRACT:
A feedback coder, which employs simple CMOS push/pull amplifiers as gain elements, along with a bistable circuit, in its preferred embodiment takes the form of a second-order delta-sigma modulator. The output of the modulator is converted into pulse code modulated words by a finite impluse response filter which incorporates a partial coefficient generator utilizing simplified logic. The generator output is provided to an accumulator in which the stage operate at reduced speed. A simple multiplexer generates a serial output. The entire converter can be integrated on a semiconductor chip of relatively small area.

REFERENCES:
patent: 3825831 (1974-07-01), Ishiguro
patent: 4509037 (1985-04-01), Harris
patent: 4584659 (1986-04-01), Stikvoort
patent: 4588981 (1986-05-01), Senn
patent: 4796004 (1989-01-01), Rich et al.

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