Title :
A rate adaption coprocessor for terminal adapters and U-interface modems
Author :
Busschaert, Hans J. ; Reusens, Peter P. ; Rabaey, Dirk H. ; Verpooten, Luc M.
Author_Institution :
Alcatel Bell Telephone, Antwerp, Belgium
fDate :
12/1/1989 12:00:00 AM
Abstract :
A multistandard rate adapter coprocessor chip, designed for use in ISDN terminal adapters and U-interface modems, is presented. It provides a compact, low-power protocol converter to connect asynchronous (up to 19200 b/s) and synchronous (up to 64 kb/s) data terminal equipment with any digital 64-kb/s network. The multistandard rate adapter chip was developed in a 2-μm CMOS technology using a hierarchical design methodology. The rate adapter is the cornerstone of a 144-kb/s U-interface modem and a major breakthrough for the next-generation multistandard terminal adapter
Keywords :
CMOS integrated circuits; ISDN; computerised signal processing; data communication equipment; digital communication systems; digital signal processing chips; modems; satellite computers; telecommunications computing; 1.92 kbit/s; 144 kbit/s; 2 micron; 64 kbit/s; CMOS technology; ISDN; U-interface modems; asynchronous DTE; data terminal equipment; digital network connection; hierarchical design methodology; low-power protocol converter; multistandard coprocessor chip; rate adaption coprocessor; synchronous DTE; terminal adapters; Application software; Coprocessors; Digital signal processors; Energy consumption; ISDN; Modems; Protocols; Read only memory; Read-write memory; Telephony;
Journal_Title :
Solid-State Circuits, IEEE Journal of
