Method and circuit for controlling voltage reflections on transm

Details Method and circuit for controlling voltage reflections on transm Method and circuit for controlling voltage reflections on transm

1993-03-24

1994-02-15

Sikes, William L.

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

307475, 307520, 307540, 307551, 307490, 333 22R, H03K 508, H03F 126

Patent

active

052870227

ABSTRACT:
The invention is a termination circuit which may be used to terminate a tester end of a transmission line between the tester and a digital device under test (DUT). The termination circuit is a clamp circuit which acts as a non-linear resistor of infinite resistance for termination voltages between zero volts (or low logic level voltage) and the power supply voltage V.sub.cc (or high logic level voltage) of the DUT, and which provides a substantially constant slope resistance set to equal the characteristic impedance (Z.sub.O) of the transmission line for voltages outside this range. Given that the output impedance of the DUT is less than the characteristic impedance Z.sub.O of a transmission line, and given the characteristics of the clamp circuit, all reflections on the transmission line as a result of unmatched impedances are totally eliminated by the clamp in twice the delay time of the transmission line. After the reflections are eliminated, the clamp acts as an open circuit. This clamp circuit may be used in virtually any application where reflections are a concern.

REFERENCES:
patent: 2867735 (1959-01-01), Kaufman
patent: 2927223 (1960-03-01), Merowitz
patent: 3214680 (1965-10-01), Kroll
patent: 3287567 (1966-11-01), Gaoh
patent: 3568073 (1971-03-01), McGuffin
patent: 3805090 (1974-04-01), Kaiser
patent: 4153848 (1979-05-01), Miyazaki
patent: 4345171 (1982-08-01), Harris, Jr.
patent: 4543495 (1985-09-01), Owen
patent: 4661979 (1987-04-01), Jakab
patent: 4952795 (1990-08-01), Gauthier et al.
patent: 5029284 (1992-07-01), Feldbaumer et al.
Barish et al; IBM-Tech. Disc. Bult. "Active Terminator"; Dec. 1974; p. 1960.

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