The work point should be controlled when open-loop Fiber Optic Gyroscope (FOG) is working, so a sin wave modulation signal with adjustable amplitude must be produced by digital method.

• 摘要开环光纤陀螺在工作时需要对其工作点进行控制，这就要求能够用数字的方法产生一个幅度可调的正弦波调制信号。