[IEEE 1998 IEEE International Conference on Electronics, Circuits and Systems. Surfing the Waves of Science and Technology - Lisboa, Portugal (7-10 Sept. 1998)] 1998 IEEE International Conference on Electronics, Circuits and Systems. Surfing the Waves of Science and Technology (Cat. No.98EX196) - A high performant 0.5 μm CMOS single chip ISDN network termination based on an embedded core and co-processor architecture