Power supply for face detection system based on triode voltage-stabilizing circuit

Abstract

The invention discloses a power supply for a face detection system based on a triode voltage stabilizing circuit, which is characterized in that it mainly consists of a control chip U2, a diode rectifier U1, a field effect transistor MOS1, a triode VT1, a diode D1, a polar capacitor C1, and a polarity capacitor C1. polarity capacitor C4, diode D4, polarity capacitor C5, voltage detection circuit, triode voltage regulator circuit connected in series between the negative output terminal of diode rectifier U1 and the voltage detection circuit, and the anode and field effect of polarity capacitor C5 respectively The drain of the transistor MOS1 and the base constant current drive circuit connected to the FB pin of the control chip U2. The present invention can effectively reduce the leakage current and loss current of the input current, and can suppress the abnormal fluctuation of the input current, so that the input current remains stable, thereby improving the stability of the output voltage and current of the present invention, and effectively improving the The detection accuracy of the detection system.

Description

technical field [0001] The invention relates to the field of electronics, in particular to a power supply for a face detection system based on a triode voltage stabilizing circuit. Background technique [0002] With the vigorous development of high technology, the face detection system is widely used as a human body identification code. At present, more and more enterprises need to apply this intelligent identification system to access control management in order to adapt to the information age. However, the power supply of the current face detection system is prone to fluctuations under the interference of external electromagnetic waves, resulting in unstable output voltage and current, which seriously affects the detection accuracy of the face detection system, causing non-staff personnel to enter the room, affecting The normal work of the user, and has brought great potential safety hazard to the user. [0003] Therefore, it is imperative to provide a power supply for a...

AI Technical Summary

Problems solved by technology

However, the power supply of the current face detection system is prone to fluctuations under the interference of external electromagnetic waves, resulting in unstable output voltage and current, which seriously affects the detection accuracy of the face detection system, causing non-staff personnel to enter the room, affecting The normal work of the user, and has brought a great potential safety hazard to the user

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