Active termination for a transmission line

Details Active termination for a transmission line Active termination for a transmission line

1979-01-31

1984-05-22

Zazworsky, John

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

307473, H03K 19003, H03K 19092

Patent

active

044503709

ABSTRACT:
A tri-state buffer having the output thereof electrically connected to the input thereof is utilized to provide an active termination for a transmission line carrying data, addresses, commands or other information. The tri-state buffer is enabled by a strobe signal so as to insure that the transmission line will be stable through the time period of the strobe signal when data, commands, addresses or other information is being transferred.
A tri-state buffer having the output thereof electrically tied through a resistive element to the input thereof is utilized to provide an active termination for a transmission line carrying strobe-type signals. The tri-state buffer is always in an enabled state. The resistance element is used to help match the line impedance of the transmission line. This reduces the load on the strobe signal source and also reduces transmission line ringing due to impedance mismatches.

REFERENCES:
patent: 3705418 (1972-12-01), Yoshitake et al.
patent: 3832575 (1974-08-01), Dasgupta et al.
patent: 3937988 (1976-02-01), De Clue et al.
patent: 4158891 (1979-06-01), Fisher
McGraw-Hill Encyclopedia of Science and Technology, vol. 5, pp. 286-290 (1971).
J. B. Peatman "Microcomputer-Based Design," McGraw-Hill Book Company 1977, pp. 300-302.

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