Power amplifier protection circuit
The utility model provides a power amplifier protection circuit. The power amplifier protection circuit comprises a power amplifier output end, a first control assembly, a second control assembly, a switching tube and a power supply signal control end which are connected in sequence. The first contr...
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| Format: | Patent |
| Sprache: | chi ; eng |
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| Zusammenfassung: | The utility model provides a power amplifier protection circuit. The power amplifier protection circuit comprises a power amplifier output end, a first control assembly, a second control assembly, a switching tube and a power supply signal control end which are connected in sequence. The first control assembly is switched on when the power amplifier output end outputs direct current, the second control assembly is switched off when the first control assembly is switched on, and the switching tube is switched on when the second control assembly is switched off. The emitter of the switch tube is grounded, the collector of the switch tube is connected with the power supply, and the power supply signal control end is connected between the power supply and the switch tube. When the switching tube is switched on, the power supply signal control end is pulled down, so that the main power supply is switched off, that is, when the power amplifier breaks down and outputs direct current, the power amplifier protection c |
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