Multi-stage noise shaping over-sampling D/A converter

Details Multi-stage noise shaping over-sampling D/A converter Multi-stage noise shaping over-sampling D/A converter

1988-09-13

1991-11-26

Scott, J. R.

Coded data generation or conversion

Analog to or from digital conversion

Differential encoder and/or decoder

341144, H03M 166

Patent

active

050686615

ABSTRACT:
A noise shaping quantization D/A converter in which an input digital signal is supplied to a single-integration sigma delta modulation circuit having quantization levels which include zero level, with a quantization error signal from the single-integration circuit being supplied to a double-integration noise shaping quantization circuit having quantization levels which also include zero level, and an output signal from the double-integration circuit being differentiated and summed with the single-integration circuit output to obtain a bit-compressed digital signal for D/A conversion. Offset of the analog output signal during a zero hold status of the input digital signal is eliminated, and increased efficiency of supply voltage utilization is attained, together with increased S/N ratio.

REFERENCES:
patent: 4071842 (1978-01-01), Tewksbury
patent: 4209773 (1980-06-01), Everard
patent: 4704600 (1987-11-01), Uchimura et al.
patent: 4843390 (1989-06-01), van Bavel et al.
1987 IEEE International Symposium on Circuits and Systems, vol. 2, May 4-7, 1987, New York, U.S., pp. 463-466; J. J. Paulos et al.: "Improved Signal-To-Noise Ratio Using Tri-Level Delta-Sigma Modulation".
Proceedings of the IEEE 1988 Custom Integrated Circuits Conference, May 16-19, 1988, New York, U.S., pp. 21.2.1-21.2.3; L. Lorenzo et al.: "A 13 bit ISDN-Band Oversampled ADC Using Two-Stage Third Order Noise Shaping".

Affiliated with

Also associated with

Rating

Multi-stage noise shaping over-sampling D/A converter does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Multi-stage noise shaping over-sampling D/A converter, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Multi-stage noise shaping over-sampling D/A converter will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2388429