05343141 is referenced by 7 patents and cites 14 patents.

A transistor overcurrent protection circuit using an error amplifier to make a voltage comparison between a threshold voltage and the collector voltage of a current sensing transistor. The current sensing transistor is arranged in a circuit such that the collector current of the current sensing transistor is a measure of the collector current of an output transistor. A driver transistor has its emitter connected to the base of the output transistor. A source of control current to the drive transistor is coupled to the output of the error amplifier. When the collector voltage of the current sense transistor falls below the threshold voltage, the error amplifier causes the control current to the drive transistor to be reduced so as to reduce the collector current of the output transistor.

Title
Transistor overcurrent protection circuit
Application Number
7/896049
Publication Number
5343141
Application Date
June 9, 1992
Publication Date
August 30, 1994
Inventor
Denis P Galipeau
Woonsocket
RI, US
John G Metro
Kingston
RI, US
Agent
Robert M Asher
Assignee
Cherry Semiconductor Corporation
RI, US
IPC
H02H 7/00
G05F 1/56
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