Power supply for human face detection system

A face detection and power supply technology, applied in the electronic field, can solve problems such as output voltage and current instability, achieve the effects of reducing leakage current and loss current, suppressing abnormal fluctuations, and eliminating potential safety hazards

Inactive Publication Date: 2016-11-16
CHENGDU HANDAO TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the defects of unstable output voltage and current in the power supply for face detection system in the prior art, and provide a power supply for face detection system

Method used

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  • Power supply for human face detection system

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Embodiment

[0015] Such as figure 1 As shown, the present invention mainly consists of the control chip U2, the diode rectifier U1, the field effect transistor MOS1, the transistor VT1, the N pole is connected to the VDD+ pin of the control chip U2 through the resistor R3, and the P pole is connected to the base of the transistor VT1 The diode D1, the anode is connected to the anode output terminal of the diode rectifier U1, the cathode is connected to the cathode output terminal of the diode rectifier U1, the cathode is connected to the gate of the field effect transistor MOS1, and the anode is connected to the control chip U2 The polar capacitor C4 connected to the EXT pin, the N pole is connected to the drain of the field effect transistor MOS1, the P pole is connected to the VSS pin of the control chip U2, and the cathode is connected to the source of the field effect transistor MOS1. The voltage of the polar capacitor C5, which is connected to the collector of the transistor VT1 after...

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Abstract

The invention discloses a power supply for a face detection system, 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, a polar capacitor C4, and a diode D4 , a polar capacitor C5, a voltage detection circuit connected to the VDD-pin of the control chip U2, the negative output terminal of the diode rectifier U1, and the emitter of the triode VT1, respectively, and the positive electrode of the polar capacitor C5 and the field effect transistor The drain of MOS1 is composed of a 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, a power supply for a face detection system. 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 kind of intelligent identification system to access control management in order to adapt to the information age. However, the current face detection system power supply is prone to fluctuate 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-workers to enter the room, affecting The normal work of the user has brought great safety hazards to the user. [0003] Therefore, it is an urgent task to provide a power supply for a face detection system that can output stable voltage and current. Summary...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M7/217H02M1/14
CPCH02M7/2176H02M1/14
Inventor 不公告发明人
Owner CHENGDU HANDAO TECH CO LTD
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