Classification Sine Triangular LC Square RC Waveform Sawtooth Element Crystal 任意波形发生器 Transformer Couple (计算、输入、键盘、鼠标) Positive Feedback Principle Integrated Negative resistance Integration Discrete Power:MicroWave oven、医疗电子设备 Use Frequency Watch,Carrier Wave Local Oscillator 一. Classification Waveform Sine Triangular Square Sawtooth 任意波形发生器 （计算、输入、键盘、鼠标） Element LC RC Crystal Transformer Couple Principle Positive Feedback Negative resistance Integration Integrated Discrete Use Power : MicroWave oven、医疗电子设备 Frequency : Watch、Carrier Wave 、 Local Oscillator