Electrical transmission or interconnection systems – Nonlinear reactor systems – Parametrons
Patent
1989-03-17
1990-11-20
Callahan, Timothy P.
Electrical transmission or interconnection systems
Nonlinear reactor systems
Parametrons
307475, 307456, 307261, 341 57, H03K 1900, H03M 516
Patent
active
049721062
ABSTRACT:
A binary-to-ternary converter arrangement which achieves protective resistance against high outside voltages without having to compromise the voltage level of the positive and negative output ternary pulses. In so achieving, the minimum amplitude requirement of a CCITT recommendation of an output pulse for a given supply voltage is satisfied. This converter arrangement includes a parallel circuit of first and second series circuits. The first series circuit forms a main current path of two transistors and the second series circuit forms a current path of a diode, two resistors, and a third transistor. The different elements of these two circuits, along with a capacitor element, are interconnected in such a way as to eliminate the need for the use of a transformer altogether. The control electrodes of the first and second transistors serve as input ports and the junction port of the two resistors serves as the output port.
REFERENCES:
patent: 3217316 (1965-11-01), Trampel
patent: 3337862 (1967-08-01), Croft et al.
patent: 3492496 (1970-01-01), Callan
patent: 3660678 (1972-05-01), Maley et al.
patent: 4345164 (1982-08-01), Gies
AT&T Bell Laboratories
Callahan Timothy P.
Canepa Lucian C.
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