Coded data generation or conversion – Analog to or from digital conversion – Differential encoder and/or decoder
Patent
1995-09-12
1999-11-30
Williams, Howard L.
Coded data generation or conversion
Analog to or from digital conversion
Differential encoder and/or decoder
341144, H03M 166
Patent
active
059950307
ABSTRACT:
An active current steering semi-digital FIR filter for a digital-to-analog conversion circuit, which includes a shift register having a 1-bit digital input stream and a plurality of output taps, where each output tap provides a 1-bit signal which has a value of a logic 1 or a logic 0, and a plurality of current paths, where each path includes an active element, such as a transistor, having a relatively high output impedance, which is connected to a common current source, and to an op amp for current-to-voltage conversion. The relatively high output impedance of the active current steering element causes any error term resulting from offset at the op amp inputs to be minimized.
REFERENCES:
patent: 3500215 (1970-03-01), Leuthoid et al.
patent: 4494107 (1985-01-01), Kearns et al.
patent: 4683458 (1987-07-01), Hallgreen
patent: 5043730 (1991-08-01), Obinata
patent: 5196850 (1993-03-01), Duffy et al.
patent: 5212659 (1993-05-01), Scott et al.
patent: 5245344 (1993-09-01), Sooch
patent: 5298900 (1994-03-01), Mauthe et al.
patent: 5323157 (1994-06-01), Ledzius et al.
patent: 5376936 (1994-12-01), Kerth et al.
patent: 5455582 (1995-10-01), Valdenaire
"An Integrated Per-Channel PCM Encoder Based on Interpolation," Bruce A. Wooley, et al., IEEE Transactions on Communications, vol. COM-27, No. 2, Feb. 1979, pp. 272-277.
"Multirate Filter Designs Using Comb Filters," Shuni Chu, et al., IEEE Transactions on Circuits and Systems, vol. CAS-31, No. 11, Nov. 1984, pp. 913-924.
"An Economical Class of Digital FIlters for Decimation and Interpolation," Eugene B. Hogenauer, IEEE Transactions on Acoustics, Speech, and Signal Processing, vol. ASSP-29, No. 2, Apr. 1981, pp. 155-162.
"Multirate Digital Filters, Filter Banks, Polyphase Networks, and Applications: A Tutorial," P. O. Vaidyanathan, Proceedings of the IEEE, Vol. 78, No. 1, Jan. 1990, pp. 56-93.
"A Multistage Delta-Sigma Modulator without Double Integration Loop," Toshio Hayashi, et al., 1986 IEEE International Solid-State Circuit Conference, ISSCC 86/Thursday, Feb. 20, 1986/California Pavilion C., THPM 14.6, pp. 182-183.
"A 3-.mu.n CMOS Digital Codec with Programmable Echo Cancellation and Gain Setting," Paul Defraeye, et al., IEEE Journal of Solid-State Circuits, vol. SC-20, No. 3, Jun. 1985, pp. 679-687.
"A 17-bit Oversampling D-to-A Conversion Technology Using Multistage Noise Shaping," Yasuyuki Matsuya, et al., IEEE Journal of Solid-State Circuits, vol. 24, No. 4, Aug. 1989, pp. 969-975.
"Fourth Order Sigma-Delta Modulator Circuit for Digital Audio and ISDN Applications," T. Karema, et al., Tampere University of Technology, Finland, pp. 223-227.
"Area-Efficient Multichannel Oversampled PCM Voice-Band Coder," Bosco H. Leung, et al., IEEE Journal of Solid-State Circuits, vol. 23, No. 6, Dec. 1988, pp. 1351-1357.
"Reduction of Quantizing Noise by Use of Feedback*," H. A. Spang, III, and P. M. Schultheiss, reprinted from IRE Trans. Commun. Systems, pp. 373-380, Dec. 1962.
"Design of Stable High Order 1-Bit Sigma-Delta Modulators," Tapani Ritoniemi, et al., Signal Processing Laboratory, Tampere University of Technology, reprinted from IEEE Proc. ISCAS'90, pp. 3267-3270, May 1990.
"A Higher Order Topology for Interpolative Modulators for Oversampling A/D Converters," Kirk C.-H. Chao, et al., reprinted from IEEE Trans. Circuits and Sys., vol. CAS-37, pp. 309-318, Mar. 1990.
"A Stereo 16-Bit Delta-Sigma A/D Converter for Digital Audio*," D. R. Welland, et al., reprinted with permission from Journal of the Audio Engineering Society, vol. 37, pp. 476-486, Jun. 1989.
"A Monolithic 50 KHz 16-Bit A/D-D/A Converter Using Sigma-Delta Modulation," Charles D. Thompson, et al., Digital Signal Processor Operation/Motorola, Inc. 1990 IEEE.
"A CMOS Oversampling D/A Converter with a Current-Mode Semi-Digital Reconstruction Filter," D. Su and B. Wooley, 1993 ISSCC, vol. 36, pp. 230-231.
"Design and Implementation of Digital FIR Filters," P. P. Vaidyanathan, Chapter 2 in Hnadbook of DSP Engineering Applications, D. F. Elliott, editor, Academic Press, 1987.
"Oversampling A/D & D/A Conversion," B. A. Wooley, Presentation to AMD at Standard University, Sep. 14, 1992.
"Finite Impulse Response Switched-Capacitor Filters for the Delta-Sigma Modulator D/A Interface," P. J. Hurst and James E. C. Brown, IEEE Trans. Circuits Sys., vol. 38, No. 11, pp. 1391-1397, Nov. 1991.
"Analog FIR Filters with an Oversampled .SIGMA.-.increment. Modulator," H. Qiuting and G. Moscytz, IEEE Trans. Circuits Syst., vol. 39, No. 9, pp. 658-663, Sep. 1992.
David K. Su, et al., "A CMOS Oversampling D/A Converter with a Current-Mode Semidigital Reconstruction Filter," IEEE Journal of Solid-State Circuits, vol. 28, No. 12, Dec. 1993, pp. 1224-1233.
Su et al. A CMOS Oversampling D/A Converter with Current-Mode Semi-Digital Reconstruction Filter, 1993 International Solid Slate CircuitsConference, Feb. 26, 1993.
Advanced Micro Devices
King Jr. Joseph W.
Williams Howard L.
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