Circuit for sensing the transistor current waveform

Details Circuit for sensing the transistor current waveform Circuit for sensing the transistor current waveform

1989-09-13

1990-05-29

Wong, Peter S.

Electricity: power supply or regulation systems

Output level responsive

Using a three or more terminal semiconductive device as the...

323280, 323351, 323288, G05F 1565

Patent

active

049298836

ABSTRACT:
A circuit for sensing the waveform of the current in a transistor, including a first transistor which is controlled on its base by a switching signal; a second transistor which is controlled on its base by a control signal which is inverted and delayed with respect to the switching signal, the collector of the first transistor being connected through a diode to the collector of the second transistor, the emitter of the first transistor and the emitter of the second transistor being connected to the ground; a third transistor connected with its base to the collector of the second transistor and with its emitter to the ground through a resistor, the third transistor being switched on when the second transistor is switched off and the first transistor is on.

REFERENCES:
patent: 4072890 (1978-02-01), Westbrook et al.
patent: 4107596 (1978-08-01), Weaver et al.
patent: 4117391 (1978-09-01), Janssen
patent: 4339707 (1982-07-01), Gorecki
patent: 4638239 (1987-01-01), Hachimori
patent: 4667145 (1987-05-01), Moreau

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