Power transistor current sensing and limiting apparatus

Details Power transistor current sensing and limiting apparatus Power transistor current sensing and limiting apparatus

1999-12-08

2000-12-12

Nguyen, Matthew

Electricity: power supply or regulation systems

Output level responsive

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

323312, G05F 1573, G05F 304

Patent

active

061603872

ABSTRACT:
A current through a transistor having a drain and a source is sensed using a resistor, and first and second current sources. The resistor is responsive to the first current source to establish a reference voltage between a first terminal and a second terminal. The second terminal of the resistor is coupled to the source of the transistor. The second current source is current-controlled by the first current source and has a current gain inversely related to a voltage between the drain of the transistor and the first terminal of the resistor.

REFERENCES:
patent: 4820968 (1989-04-01), Wrathall
patent: 5635823 (1997-06-01), Murakami et al.
patent: 5767545 (1998-06-01), Takahashi
patent: 5828308 (1998-10-01), Fukami
patent: 5909112 (1999-06-01), Kiyota et al.

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