Electrical transmission or interconnection systems – Nonlinear reactor systems – Parametrons
Patent
1993-01-15
1993-12-21
Wambach, Margaret R.
Electrical transmission or interconnection systems
Nonlinear reactor systems
Parametrons
307568, 307574, 307548, 307546, 307270, 323274, 323279, 323284, H03K 301, H03K 508
Patent
active
052723992
ABSTRACT:
A circuit configuration for limiting current flowing through a power MOSFET includes a voltage divider being connected between drain and source terminals of the power MOSFET and having a node at which a voltage following a drain-to-source voltage of the power MOSFET drops. A control transistor has a load path connected between the gate terminal and the source terminal of the power MOSFET. The control transistor is made conducting as a function of the voltage at the node of the voltage divider if the drain-to-source voltage of the power MOSFET exceeds a predetermined value. A resistor is connected between the gate terminal of the control transistor and the gate terminal of the power MOSFET. A depletion FET has a drain terminal connected to the gate terminal of the control transistor. The source terminal of the depletion FET is connected to the node of the voltage divider. The gate terminal of the depletion FET is connected to the source terminal of the power MOSFET.
REFERENCES:
patent: 4952827 (1990-08-01), Leipold et al.
patent: 5004970 (1991-04-01), Barou
Leipold Ludwig
Sander Rainald
Tihanyi Jenoe
Greenberg Laurence A.
Lerner Herbert L.
Siemens Aktiengesellschaft
Wambach Margaret R.
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