Electrical transmission or interconnection systems – Nonlinear reactor systems – Parametrons
Patent
1980-08-21
1983-01-25
Zazworsky, John
Electrical transmission or interconnection systems
Nonlinear reactor systems
Parametrons
307252B, 307252UA, 357 38, 357 39, H03K 1772
Patent
active
043705677
ABSTRACT:
A semiconductor switch device suitable for a.c. power control includes three 4-layer switch components in parallel in a single body of semiconductor material. First and second components are of the same polarity and of opposite polarity to the third component. One end connection of the second component is taken out as a secondary gate connection separate from the corresponding connections of the first and third components. In a preferred mode of use, the secondary gate connection is maintained at a d.c. potential relative to the corresponding connections of the first and third components so as to enable the second component to be conducting during the zero crossings of the a.c. supply and able to maintain the internal voltages required for conduction of either or both of the other components. Circuits are given for integrated circuits embodying the device to permit zero voltage switching power controllers to be made with few external components, and for a proportional controller providing a variable mark-to-space ratio in dependence upon a variable resistor.
REFERENCES:
patent: 3970843 (1976-07-01), Dumas
Honeycutt Gary
Merrett N. Rhys
Sharp Melvin
Texas Instruments Incorporated
Zazworsky John
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