Dual quantization oversampling digital-to-analog converter

Details Dual quantization oversampling digital-to-analog converter Dual quantization oversampling digital-to-analog converter

1992-09-01

1994-11-29

Hoff, Marc S.

Coded data generation or conversion

Analog to or from digital conversion

Differential encoder and/or decoder

341145, H03M 302

Patent

active

053694031

ABSTRACT:
An oversampling D/A converter system achieves high linearity and low quantization error by using dual internal D/A converters: one with high linearity but high quantization error and the other with low linearity but low quantization error. A signal path in the system includes an L-bit quantizer for quantizing a digital input signal into an L-bit signal plus a quantization error and a D/A converter for converting the L-bit signal and quantization error into an analog signal. A correction path that parallels the signal path includes an M-bit quantizer, where M is greater than L, and an M-bit D/A converter. A signal generated by the correction path cancels the shaped quantization error of the signal generated by the signal path by adding the negative of the shaped quantization error to the signal of the signal path. The resulting analog signal is filtered by a low-pass analog filter to extract the analog equivalent of the digital input signal. Various arrangements of filter stages are also disclosed for constructing preferred implementations of the oversampling D/A converter.

REFERENCES:
patent: 4467316 (1984-08-01), Musmann et al.
patent: 4772871 (1988-09-01), Suzuki et al.
patent: 4929516 (1990-07-01), Early
patent: 4939516 (1990-07-01), Early
patent: 4943807 (1990-07-01), Early et al.
patent: 4987416 (1991-01-01), Leslie
patent: 5027120 (1991-06-01), Thurston
patent: 5027306 (1991-06-01), Dattorro et al.
patent: 5039989 (1991-08-01), Welland et al.
ISSCC91/Session 4/Oversampling-Converters/Paper WP 4.5 WPM 4.5: A Bitstream Digital-to-Analog Converter with 18b Resolution by Ben M. J. Kpu, Eise C. Kijkmans, Hans Naus, Jack Sneep; paper plus attachments.
An Improved Sigma-Delta Modulator Architecture by T. C. Leslie and B. Singh, pp. 372 through 375.
Digitally Corrected Multi-Bit .SIGMA..DELTA. Data Converters by T. Cataltepe, A. R. Kramer, L. E. Larson, G. C. Temes and R. H. Walden, pp. 647 through 650.
Sec. 14-36 Modulators, Demodulators, and Converters, pp. 14-42 through 14-46.
IEEE Jouranl of Solid-State Circuits, vol. SC-22, No. 3, Jun. 1987 A CMOS Stereo 16-bit D/A Converter For Digital Audio by Peter J. A. Naus, Eise Carel Kijkmans, Eduard F. Stikvoort, Andrew J. McKnight, David J. Holland, and Werner Bradinal, pp. 390 through 394.
IEEE Journal of Solid-State Circuits, vol. 24, No. 4, Aug. 1989 A 17-bit Oversampling D-to-A Conversion Technology Using Multistage Noise Shaping by Yasuyuki Matsuya, Kunihara Uchimura, Atsushi Iwata, Member, EEEE, and Takao Kaneko, pp. 969 through 975.
The Institute of Electrical and Electronics Engineers, Inc., New York Oversampling-Delta-Sigma Data Converters Theory, Design, and Simulation by James C. Candy and Gabor C. Temes, pp. 1 through 29.
ISSCC91/Session 4/Oversampling-Converters/Paper WP 4.7 WPM 4.7: A 16b Oversampling CODEC with Filtering DSP by Toshiyuki Okamoto, Yuichi Maruyama, Kiyonobu Hinooka, Akira Yukawa; paper plus attachments.

Affiliated with

Also associated with

Rating

Dual quantization oversampling digital-to-analog 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 Dual quantization oversampling digital-to-analog converter, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Dual quantization oversampling digital-to-analog converter will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-76282