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稳压电源的输出电压V_0,受到输入电压V_1、负载电流I_0和环境温度T等的扰动而变化。希望获得稳压电源恒零输出,势必要求用扰动去补偿调整管基极电流所需要的变化量。扰动补偿原理在高效能低功耗稳压电源中的应用,一般有两种办法:一种是误差放大器输入端补偿,经放大后输出去控制调整管。另一种是在调整管输入端补偿(也就是在误差放大器输出端补偿)。前者误差放大器不是恒零输出,而后者是恒零输出。后者为主动扰动补偿。一、在误差放大器输入端补偿下面以变形互补电流放大器高效能低功耗稳压电源,来说明电压补偿、电流补偿和温度补偿。
The output voltage V_0 of the regulated power supply is changed by the disturbance of the input voltage V_1, the load current I_0 and the ambient temperature T and so on. Hope to obtain constant voltage power supply zero output, it is bound to require the use of disturbances to compensate for the adjustment of the tube base current changes required. Disturbance compensation principle In high-performance low-power power supply applications, there are generally two ways: one is the error amplifier input compensation, the amplified output to control the adjustment tube. The other is to adjust the tube input compensation (that is, the error amplifier output compensation). The former error amplifier is not a constant zero output, while the latter is a constant zero output. The latter is active disturbance compensation. First, at the input of the error amplifier to compensate the following deformation complementary current amplifier high-performance low-power power supply, to illustrate the voltage compensation, current compensation and temperature compensation.