Electrical transmission or interconnection systems – Nonlinear reactor systems – Parametrons
Patent
1978-01-16
1979-06-26
Zazworsky, John
Electrical transmission or interconnection systems
Nonlinear reactor systems
Parametrons
307296R, 328203, H03K 3295, H03K 102
Patent
active
041594312
ABSTRACT:
To prevent uncontrolled switching of a Schmitt trigger during supply voltage shutoff, the trigger input transistor is maintained in the conductive state independent of supply voltage by a voltage divider and an additional DC base voltage. A second voltage divider furnishes a voltage blocking the output transistor of the Schmitt trigger after the supply voltage sinks too low to maintain conduction of the first transistor. A first and second so constructed Schmitt trigger is connected, respectively, to the first and second output of a difference amplifier. The inputs of the difference amplifier are connected to a pulse generator. Since the DC operating point of the difference amplifier changes with supply voltage, a controllable current source is connected to the difference amplifier for opposing the changes in the operating point. The controllable current source is controlled by the output signal from a summing and comparator circuit which has a first set of inputs connected to the outputs of the difference amplifier and a reference input.
REFERENCES:
patent: 3131314 (1964-04-01), Charlot, Jr.
patent: 3604945 (1971-09-01), Hoffman et al.
Jundt Werner
Roozenbeek Herman
Robert & Bosch GmbH
Zazworsky John
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