Opamps are widely used in many fields nowadays such as AID and D/A converter, active filter and AGC. All kinds of different opamps appear for special applications.

• 运算放大器在现代科技的各个领域得到了广泛的应用,如A/D与D/A转换器、有源滤波器、自动增益控制器等,针对不同的应用领域出现了不同类型的运放。