说明：  《模拟电路》课程设计报告--运算放大器组成函数信号发生器 设计任务：运算放大器设计方波——三角波——正弦波函数信号发生器
( Analog circuit, the report of the curriculum design- the composition of op-amp function signal generator design task: Operational Amplifier Design square- Triangle wave- sine function signal generator)