DocumentCode :
3039418
Title :
Simultaneous bidirectional signalling for IC systems
Author :
Lam, Kevin ; Dennison, Larry R. ; Dally, William J.
Author_Institution :
Dept. of Electr. Eng. & Comput. Sci., MIT, Cambridge, MA, USA
fYear :
1990
fDate :
17-19 Sep 1990
Firstpage :
430
Lastpage :
433
Abstract :
A design and implementation of an input/output (I/O) circuit capable of simultaneous bidirectional transmission in CMOS integrated circuits are presented. Conventional techniques for improving communication bandwidth between VLSI chips use the tri-state bidirectional drivers and/or add more I/O pins to a given chip. The design of simultaneous bidirectional transmission of signals between two chips results in optimal performance while maintaining the same pin count. The circuitry has a low output-voltage swing and occupies relatively small silicon area, so that both high speed and low power dissipation are achieved. Included also is the design of a current driver that can properly terminate a given transmission line without the use of any off-chip termination resistors. The design remains functional under significant process variation. Simulation results show that the I/O circuit can be clocked with a frequency over 50 MHz under the worst-case condition for a typical 2-μm CMOS process. This implies a bandwidth of more than 100 Mb/s per I/O pin
Keywords :
CMOS integrated circuits; driver circuits; packaging; transmission lines; CMOS integrated circuits; I/O circuit; IC systems; communication bandwidth; current driver; off-chip termination resistors; optimal performance; power dissipation; simulation results; simultaneous bidirectional signalling; size 2 μm; transmission line; tri-state bidirectional drivers; Bandwidth; CMOS integrated circuits; Distributed parameter circuits; Driver circuits; Pins; Power dissipation; Power transmission lines; Signal design; Silicon; Very large scale integration;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Computer Design: VLSI in Computers and Processors, 1990. ICCD '90. Proceedings, 1990 IEEE International Conference on
Conference_Location :
Cambridge, MA
Print_ISBN :
0-8186-2079-X
Type :
conf
DOI :
10.1109/ICCD.1990.130272
Filename :
130272
Link To Document :
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