Electrical transmission or interconnection systems – Nonlinear reactor systems – Parametrons
Patent
1984-04-27
1986-05-27
Heyman, John S.
Electrical transmission or interconnection systems
Nonlinear reactor systems
Parametrons
307571, 307246, 307263, 307268, 307270, H03K 494, H03K 3353, H03K 17284
Patent
active
045917345
ABSTRACT:
An integratable circuit for controlling the turn-off time-rate-of-voltage-change of a non-regenerative power switching device (such as a field-effect transistor, an insulated gate transistor and the like) uses a single capacitive element, in conjunction with a first current source, to provide a ramp voltage generator which is operative only if a ramp generator terminal is disconnected from a circuit common potential. The circuit uses a second current source and a controlled-conduction device to provide a control electrode drive signal to the at least one power switching device, controlling the flow of current through a load from a unipolarity or bipolarity source. The voltage across the controlled-conduction circuit of the power switching device then active is applied in attenuated form to another input of the ramp voltage generator to control the load voltage time-rate-of-change during load current turn-off.
REFERENCES:
patent: 4256979 (1981-03-01), Hendrickson et al.
patent: 4445055 (1984-04-01), Bete
patent: 4477742 (1984-10-01), Janutka
Davis Jr. James C.
General Electric Company
Heyman John S.
Krauss Geoffrey H.
Snyder Marvin
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