Some kinds of linear amplifier utilize a tube as a load element in the amplifier circuit. 有的利用各种管道作为线性放大器负载的放大器电路组成。
A linear power amplifier is used, which is mainly made up of an operation amplifier and a Darlington transistor because of the low power range. 由于是处在小功率范围,功率放大器采用的是线性放大器,由一个运算放大器和一个达林顿管构成了功率放大器的主体。