Synthetic reactor circuit

Details Synthetic reactor circuit Synthetic reactor circuit

1975-01-06

1976-06-22

Gensler, Paul L.

Wave transmission lines and networks

Attenuators

307230, 330107, H03H 1100

Patent

active

039654478

ABSTRACT:
Communication system interface circuits for bi-directional transmission of signals between terminal sets, each interface circuit comprising a transformer including first winding means coupled through rectifier means and a low-pass filter to a first terminal set and including second winding means having end terminals coupled through diodes to the output of a high frequency inverter and having a center tap coupled through an inductive impedance to a neutral circuit point, a second terminal set being coupled across the inductive impedance. The first terminal set may be connected to a telephone subset with ringing and bias signals being applied in circuit with the inductive impedance. The inductive impedance includes transistor means controlled by an operational amplifier which is controlled from a resistance-capacitance phase-shift means, the impedance being equivalent to that of an inductance and a series resistance.

REFERENCES:
patent: 3643173 (1972-02-01), Whitten
patent: 3772604 (1973-11-01), Hogg et al.

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