Miscellaneous active electrical nonlinear devices – circuits – and – Specific identifiable device – circuit – or system – With specific source of supply or bias voltage
Patent
1996-06-07
1998-09-29
Callahan, Timothy P.
Miscellaneous active electrical nonlinear devices, circuits, and
Specific identifiable device, circuit, or system
With specific source of supply or bias voltage
327538, G01R 19165
Patent
active
058150277
ABSTRACT:
A field-effect-controllable power semiconductor component has a drain terminal, a source terminal, a gate terminal, a drain-to-source voltage and a load current. A circuit configuration for detecting the load current of the power semiconductor component includes a further field-effect-controllable semiconductor component through which a fraction of the load current flows. The further semiconductor component has a drain terminal connected to the drain terminal of the power semiconductor component, a gate terminal connected to the gate terminal of the power semiconductor component, a source terminal and a drain-to-source voltage. A resistor at which a voltage proportional to the load current can be picked up, is connected to a fixed potential terminal. A controllable resistor is connected between the resistor and the source terminal of the further semiconductor component. The controllable resistor adjusts the current of the further semiconductor component so that the drain-to-source voltages of the power semiconductor component and the further semiconductor component are equal to one another.
REFERENCES:
patent: 4885477 (1989-12-01), Bird et al.
patent: 4910455 (1990-03-01), Nadd
patent: 5097456 (1992-03-01), Kotowski et al.
patent: 5652540 (1997-07-01), Eilley
An article entitled "Surviving Short Circuits" by R. Frank and A. Pshaenich, in Machine Design, Mar. 8, 1990, pp. 89-96.
Koroncai Adam-Istvan
Tihanyi Jenoe
Callahan Timothy P.
Greenberg Laurence A.
Lam T. T.
Lerner Herbert L.
Siemens Aktiengesellschaft
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