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

Becker, P.P.BeckerBradinal, W.W.BradinalFiedler, H.-L.H.-L.FiedlerLamkemeyer, M.M.LamkemeyerLerch, R.R.Lerch2022-03-082022-03-081991https://publica.fraunhofer.de/handle/publica/318865This 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.enA/D converterCCITT G.722CODECSigma-Delta Modulation621A monolithic Sigma-Delta A/D and D/A converter with filter for broadband speech codingconference paper