Electrical transmission or interconnection systems – Nonlinear reactor systems – Parametrons
Patent
1974-06-28
1976-01-27
Heyman, John S.
Electrical transmission or interconnection systems
Nonlinear reactor systems
Parametrons
333 6, H03K 1700
Patent
active
039354806
ABSTRACT:
The broad band directional signal generator disclosed generates signals on a transmission line, which, controllably propagate in one direction on the line to the exclusion of the other direction, or in both directions. Such signal generation may occur at one or a multiplicity of points located at arbitrary positions along the line. The signal generator includes a conventional .pi., 0, T, or H attenuator network and operates in conjunction with other circuitry. In the disclosed embodiments, symmetrical attenuators are used with either single ended or push-pull amplifiers connected to the attenuator nodes. The invention, however, is equally applicable to .pi., 0, T, or H attenuator networks which are not symmetrical. The specific embodiments shown employing active devices and direct coupling have wide frequency responses which are flat and flat to DC. Where operation down to DC is not required, AC or transformer coupling may be used. The circuits disclosed have applications in analog and digital communication paths where two-way information flow exists and where a multiplicity of ports may share the same path.
REFERENCES:
patent: 3372350 (1968-03-01), Kawahashi et al.
patent: 3453529 (1969-07-01), Richman
patent: 3458836 (1969-07-01), Engelbrecht
patent: 3600707 (1971-08-01), Friedman
Davis B. P.
Heyman John S.
International Business Machines - Corporation
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