Voltage clamping circuit

The utility model discloses a voltage clamping circuit, include: triode Q1, steady voltage diode DZ1, current -limiting resistor R1, input voltage VB, output voltage VCC, triode Q1's base is passed through current -limiting resistor R1 and is connected input voltage VB, input voltage VB is connected to triode Q1's collecting electrode, and output voltage VCC is connected to triode Q1's projectingpole, zener diode DZ1 ground connection is passed through to triode Q1's base. The utility model discloses a current -limiting resistor and zener diode do clamp circuit's method, add the triode simultaneously and are current amplification, are greater than the voltage that zener diode switched on through inputing one, and zener diode is setting for the within range to stabilization of output, andit can stabilizing the voltage to reach, and increase output impedance's that again can not be too many purpose provides a reliable stable voltage signal for follow -up circuit. 本实用新型公开种电压钳位电路，包括：三极管Q1、稳压二级管DZ1、限流电阻R1、输入电压VB、输