DocumentCode :
1180581
Title :
The D4 channel bank codec
Author :
Spires, D. Alan
Volume :
25
Issue :
7
fYear :
1978
fDate :
7/1/1978 12:00:00 AM
Firstpage :
468
Lastpage :
475
Abstract :
A shared 
PCM codec has been developed for the D4 channel bank which was introduced in 1976. The codec consists of two hybrid IC\´s that utilize a common LSI D/A converter chip. Operating over the temperature range of 0-75°C, the codec economically provides near theoretical S/D perfornance, gain tracking of better than 
0.25 dB, gain stability better than 0.15 dB, and average system performance of 14.5-dBrnCO idle channel noise and 83-dB cross-talk coupling loss. A description of this codec and the derivation of its design objectives are presented.
PCM codec has been developed for the D4 channel bank which was introduced in 1976. The codec consists of two hybrid IC\´s that utilize a common LSI D/A converter chip. Operating over the temperature range of 0-75°C, the codec economically provides near theoretical S/D perfornance, gain tracking of better than 0.25 dB, gain stability better than 0.15 dB, and average system performance of 14.5-dBrnCO idle channel noise and 83-dB cross-talk coupling loss. A description of this codec and the derivation of its design objectives are presented.Keywords :
PCM coding/decoding; Voice frequency applications; Channel bank filters; Codecs; Crosstalk; Hybrid integrated circuits; Large scale integration; Performance gain; Phase change materials; Stability; System performance; Temperature distribution;
fLanguage :
English
Journal_Title :
Circuits and Systems, IEEE Transactions on
Publisher :
ieee
ISSN :
0098-4094
Type :
jour
DOI :
10.1109/TCS.1978.1084510
Filename :
1084510
Link To Document :
