Switching circuit

Details Switching circuit Switching circuit

2007-05-22

2007-05-22

Le, Dinh T. (Department: 2816)

Miscellaneous active electrical nonlinear devices, circuits, and

Gating

Utilizing three or more electrode solid-state device

C327S541000, C323S312000

Reexamination Certificate

active

10541385

ABSTRACT:
The present invention provides a switching circuit comprising a current detecting circuit that detects current waveform of a main switch in real time waveform and outputs it in low impedance. The switching circuit comprises the current detecting circuit having the main switch (11), of which on-voltage shows resistance characteristics, wherein a gate terminal is connected to a driving circuit (4) and further either terminal of drain or source thereof is connected to a fixed potential (3) and the other terminal thereof is connected to a load circuit (2) respectively, a first resistance element (21), of which resistance value is higher than on-resistance of the main switch connected to the fixed potential (3), a subsidiary switch (12), a source terminal thereof is connected to the first resistance element (21), an amplifier (6) that amplifies comparatively voltage generated in the first resistance element (21) and outputs to a gate terminal of the subsidiary switch (12) and the second resistance element (22) that generates voltage by amplifying on-current of the main switch (11) by connecting to the drain terminal of the subsidiary switch (11).

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Supplementary European Search Report dated Mar. 7, 2006.
International Search Report for PCT/JP2004/000029 mailed on Feb. 24, 2004.
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Partial Translation of the JPO Office Action.

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