A new companding DAC for PCM telephone codecs

O M SALEM, B S SONDE

Abstract


This paper presents a  new architecture for companding  DAC required in PCM telephone codecs and  suitable for lC realization. This  DAC  has  facilities  for  pin-selecting  u/A  laws,  use in  encoder/decoder operations  and  with  unipolar / bipolar  Vref.  An approach  to  optimizing  this  DAC  using  CAD  techniques  is also  covered  here.

Keywords


Companding DAC; PCM telephone codec.

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