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An NMOS Telephone Codec for Transmission and Switching Applications

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3 Author(s)
Hoff, M.E. ; Intel Corp., Santa Clara, CA ; Huggins, J. ; Warren, B.M.

This paper describes a monolithic high-feature per-channel companded PCM coder/decoder (codec) and implications of the advanced architecture for fixed and variable time-slot applications. Technology tradeoffs are identified, and implementation of the critical analog circuit functions in n -channel MOS technology is discussed. These circuits include the first commercial embodiment of a novel buried-ion voltage reference.

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Communications, IEEE Transactions on  (Volume:27 ,  Issue: 2 )