Wave transmission lines and networks – Dissipating terminations for long lines – Fluid-cooling
Patent
1995-11-28
1997-03-25
Gensler, Paul
Wave transmission lines and networks
Dissipating terminations for long lines
Fluid-cooling
326 30, H03H 1128
Patent
active
056148739
ABSTRACT:
In order to avoid signal reflections, a transmission line connected to an electronic circuit is terminated by a terminating impedance. The value of the terminating impedance is to match in the best possible way in the frequency zone of the circuit with the value of a characteristic impedance of the transmission line to be terminated. The invention provides an electronic circuit in which the terminating impedance is a series combination of an active impedance and a passive impedance. The passive impedance is of the same order of magnitude as the characteristic impedance. The terminating impedance matches well with the characteristic impedance of the transmission line even at high frequencies. By modifying the settings of the active impedance, both the value of the terminating impedance and the DC voltage on a transmission line termination can be set.
REFERENCES:
patent: 4071778 (1978-01-01), Nakagomi
patent: 5227677 (1993-07-01), Furman
patent: 5287022 (1994-02-01), Wilsher
patent: 5523704 (1996-06-01), So
"Influence of Transmission-Line Interconnections Between Gigabit-per-Second IC's on Time Jitter and Instabilities", by J. Hauerschild et al, Journal of Solid State Circuits, vol. 25, No. 3, Jun. 1990, pp. 763-766.
Gensler Paul
Schmitt Michael E.
U.S. Philips Corporation
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