Electrical transmission or interconnection systems – Nonlinear reactor systems – Parametrons
Patent
1977-11-03
1979-09-11
Zazworsky, John
Electrical transmission or interconnection systems
Nonlinear reactor systems
Parametrons
307266, 307236, 307268, 307311, 328165, H03K 508, H03K 518
Patent
active
041676823
ABSTRACT:
First and second indicating circuits connect a source of ternary pulses to a load. The ternary pulses are subject to baseline overshoot above a threshold level for a given period of time after the termination of each pulse. The first indicating circuit transmits an indication to the load responsive to ternary pulses of positive polarity above the threshold level. The second indicating circuit transmits an indication to the load responsive to ternary pulses of negative polarity above the threshold level. Transmission of an indication to the load by the second indicating circuit is inhibited for the given period of time after the termination of a ternary pulse of positive polarity above the threshold level to suppress negative baseline overshoot. Transmission of an indication to the load by the first indicating circuit is inhibited for the given period of time after the termination of a pulse of negative polarity above the threshold level to suppress positive baseline overshoot. The load is preferably an up-down counter that senses errors in the ternary pulse pattern. The indicating circuit each include a normally nonconducting switching transistor, inhibited by clamping circuits which are controlled by cross coupled feedback paths having a significant transmission delay relative to the duration of the ternary pulses, but smaller than the minimum interval between successive ternary pulses. In one embodiment, the level of the ternary pulses is sensed by a light emitting diode optically coupled to a photo resistor, which shunts the source for purposes of automatic gain control. In another embodiment, a bias turn-on switch is actuated when a minimum pulse level occurs.
REFERENCES:
patent: 3421099 (1969-01-01), O'Malley
patent: 3448395 (1969-06-01), Webb
patent: 3490027 (1970-01-01), Galetto et al.
patent: 3825773 (1974-07-01), Kivistik
Communication Manufacturing Co.
Zazworsky John
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