| 摘要 |
A short-circuit protection device for an audio amplifier, comprising a preamplifier and an output amplifier including one or more current amplifier branches each having an output transistor included therein. A measuring resistor is connected between an electrode of each output transistor and the output of the amplifier. A feedback transistor is connected in parallel with at least one of the measuring resistors and is connected to the control electrode of a thyristor. The thyristor has an electrode connected to one or more current source transistors so as to block these transistors and to decouple the output amplifier upon the occurrence of an excessive current in one of the current amplifier branches of the output amplifier.
|
