基于运算放大器的三相正弦波振荡电路的研究

Research of Three Phase Sinusoidal Oscillator Based on Operational Amplifier

在实验室实验、测量等过程中,经常会用到三相正弦信号。通常情况下可以利用变压器从电网获得,但很不方便而且有一定的危险性和局限性。这里,利用运算放大器构成一种三相正弦波振荡电路,可以输出三相正弦波电压。输出频率可以由直流电压控制,并具有自动幅度稳定功能。

In process of laboratory experiment, survey, three phase sinusoidal signals are always applied. Usually in the situ -ation we may obtain the transformer from the electrical network, but not convenient and has certain risk and the limitation very much. Here, the operational amplifier to constitute one kind of three phase sine wave oscillating circuit, it can output three phase sine wave voltages. The output frequency is controlled by the DC voltage,and has the automatic scope stable function.