Voltage detection circuit

• Main Author: LIANG JIANYI
• Format: Patent
• Language: Chinese; English
• Published: 22.08.2023
• Subjects: APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC,OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWERSUPPLY SYSTEMS; CONTROL OR REGULATION THEREOF; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUTPOWER; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER; ELECTRICITY; EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS; GENERATION; MEASURING; MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES; PHYSICS; TESTING

The utility model relates to a voltage detection circuit, comprising a Zener diode D1 and a triode Q1, the cathode of the Zener diode D1 is connected with a power supply input end, the anode of the Zener diode D1 is respectively connected with a resistor R2, a capacitor C1 and a resistor R3, the other end of the capacitor C1 and the other end of the resistor R3 are grounded, the other end of the resistor R2 is connected with the base electrode of the triode Q1, and the other end of the triode Q1 is connected with the base electrode of the triode Q1. The collector electrode of the triode Q1 is respectively connected with a resistor R1, a capacitor C2 and a resistor R4, the other end of the resistor R1 is connected with a power supply output end, the other end of the capacitor C2 and the emitter electrode of the triode Q1 are grounded, and the other end of the resistor R4 is connected with a PF output end and is used for outputting a high level or a low level. And the circuit can be triggered reliably and quick