| 摘要 |
To limit the current through the emitter-collector path of an output transistor, typically a Darlington transistor pair (T7, T8) to a load, in case of short circuit or malfunction of the load (L), in which a control circuit path resistor (R1) is serially connected with the emitter-collector path of the output transistor and the load, a reference current source is provided, connected to have current flow additionally through the resistor (R1) and providing control current to the output transistor at a control terminal (2) thereof, thereby permitting self-regulation of output current to a safe level regardless of reflected load resistance.
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