Noise shaper circuit

Details Noise shaper circuit Noise shaper circuit

1992-04-24

1994-01-25

Hoff, Marc S.

Coded data generation or conversion

Analog to or from digital conversion

Differential encoder and/or decoder

341 77, H03M 302

Patent

active

052819698

ABSTRACT:
According to this invention, a noise shaper circuit capable of realizing an integrated circuit having a small chip area is provided.
In calculating circuits for calculating input data represented by a twos complement and feedback data of output data converted into data having a small word length, the input data is divided into upper bits and lower bits with respect to a bit rounded off during a word length converting operation, only the upper bits are used in a calculation, and the calculation result and the lower bits which are not used in the calculation are added to the LSB of the calculation result again, and the resultant data is output to the next stage.

REFERENCES:
patent: 5057840 (1991-10-01), Ledzius et al.
patent: 5079551 (1992-01-01), Kimura et al.
patent: 5155743 (1992-10-01), Jacobs
patent: 5181032 (1993-01-01), Ribner
Peter J. A. Naus et al. "A CMOS Stereo 16-bit D/A Converter for Digital Audio" IEEE Journal of Solid-State Circuits, vol. sc-22, No. 3, Jun. 1987 pp. 390-394.

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