Adaptable nonlinear transmission line terminator

Details Adaptable nonlinear transmission line terminator Adaptable nonlinear transmission line terminator

1980-06-30

1982-08-17

Zazworsky, John

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

179 86, 307360, 307544, 307549, 307564, 328171, 333 32, H03K 508, H03H 740

Patent

active

043451713

ABSTRACT:
A nonlinear transmission line terminator terminates a transmission line having an input from any one of a plurality of logic types. Emitter coupled logic (ECL), transistor logic (TTL), Schottky transistor logic (STTL), low power Schottky transistor transistor logic (LSTTL), complementary MOS (CMOS) and the like are accommodated by impressing the voltage representing a "0" of the logic circuitry being accommodated on one reference terminal and the corresponding "1" voltage on another reference terminal. The terminator presents a very high impedance when the input signal from the transmission line is of an amplitude falling within the "0" and "1" voltage range. When the input signal falls outside the voltage range, the impedance of the terminator matches that of the transmission line to reduce line reflections by providing a path for current to flow from the transmission line to the appropriate one of the "1" or "0" reference terminals. The terminator further has constant current circuitry for maintaining the current flow at or below a predetermined level irrespective of the amplitude of the input voltage signal.

REFERENCES:
patent: 2863123 (1978-12-01), Koch
patent: 3937988 (1976-02-01), De Clue et al.

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