Precise voltage stabilizing circuit formed by single operational amplifier and transistor

The utility model provides a precision voltage stabilizing circuit formed by a single operational amplifier and a transistor, and belongs to the technical field of automation. The circuit is composed of an operational amplifier A, an output drive circuit T1, a diode D, a voltage-regulator tube, a resistor and other elements. A precise voltage conversion circuit from input voltage to output voltage is formed by converting reference voltage, for a circuit with small load current, the circuit can be simplified, and the output voltage can be finely adjusted by adjusting a variable resistor. The circuit is simple in form and high in precision, has good social benefits and economic benefits, and has certain popularization and application values. 本实用新型提供了一种单运放与晶体管构成的精密稳压电路，属于自动化技术领域。本实用新型由运算放大器A、输出驱动电路T1、二极管D、稳压管及电阻等元件组成。通过变换基准电压构成输入电压到输出电压的精密电压变换电路，对于负载电流很小的电路，本实用新型的电路还可简化，并可以通过调整可变电阻微调输出电压。本实用新型电路形式简单，精度较高，具有良好的社会效益与经济效益，具备一定的推广应用价值。