Variable gain amplifier at most commonly mixed signal lsi plays an important role, it is widely used in medical equipment, hearing, disk drives, and wireless communication, etc.

• 可变增益放大器在目前最常用的混合信号大规模集成电路中有着重要的作用，它广泛应用于医疗设备，助听器，磁盘驱动，和无线通讯等领域之中。