目前广泛采用由阻容元件构成的移相电路。这种电路结构简单,但由于电容的阻抗决定于频率,因此存在输出相位和振幅随频率而变化的缺点。本文所述的是采用延迟元件的相位和振幅特性不变的宽带移相电路。其原理如图1所示。 Currently widely used by the RC element phase shift circuit. This circuit has a simple structure, but since the impedance of the capacitor depends on the frequency, there is a disadvantage that the output phase and amplitude vary with frequency. Described herein is a wideband phase-shifting circuit that uses the same delay and amplitude characteristics. The principle shown in Figure 1.