Sampling amplification circuit used for buzzer sound test circuit
The utility model provides a sampling amplification circuit used for a buzzer sound test circuit. The sampling amplification circuit used for the buzzer sound test circuit comprises a microphone output end connected with one end of a sixth resistor and one end of an eleventh resistor, the other end...
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| Format: | Patent |
| Sprache: | eng |
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| Zusammenfassung: | The utility model provides a sampling amplification circuit used for a buzzer sound test circuit. The sampling amplification circuit used for the buzzer sound test circuit comprises a microphone output end connected with one end of a sixth resistor and one end of an eleventh resistor, the other end of the sixth resistor is connected with the power supply output end of a voltage transformation rectifying circuit, and other end of the eleventh resistor is grounded. One end of a sixteenth capacitor is connected with one end of the sixth resistor, and the other is connected with one end of an eighth resistor. The other end of the eighth resistor is connected with the cathode input end of a first amplifier, the anode input end of the first amplifier is connected with one end of a thirteenth resistor, and the other end of the thirteenth resistor is grounded. The cathode input end of the first amplifier is also connected with one end of a fourth resistor, the other end of the fourth resistor is connected with the output end of the first amplifier, and the output end of the first amplifier is also connected with one end of a seventeenth capacitor. |
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