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A monolithic Sigma-Delta A/D and D/A converter with filter for broadband speech coding


Institute of Electrical and Electronics Engineers -IEEE-:
IEEE International Solid-State Circuits Conference 1991. Digest of technical papers
New York/N.Y., 1991
International Solid-State Circuits Conference <38, 1991, San Francisco/Calif.>
Conference Paper
Fraunhofer IMS ()
A/D converter; CCITT G.722; CODEC; Sigma-Delta Modulation

This 5V 14b 16ksample/s CODEC meets the analog requirements for CCITT broadband speech coding with 0.3.dB passband ripple and 80dB dynamic range. A continuous-tim3 sigma-delta coder with specialized DSP for FIR filtering are integrated on a 31mmü3fm CMOS chip dissipating 125 mW.