标准的集成电路运算放大器通常适宜作为音频放大器用。为了保证稳定性,需要采用频率补偿。对某些类型的运算放大器,这已在内部“装入”,如果没有,则需外加元件。这种补偿的效应是“轧平”频率特性,轧平的起始频率取决于所用负反馈的深度。因此,须设计补偿电路和反馈,使能获得需要的增益和频率特性。 Standard integrated circuit op amps are often suitable as audio amplifiers. In order to ensure stability, the need for frequency compensation. For some types of op amps, this is “internally loaded” and if not, additional components are required. The effect of this compensation is the “flattening” frequency characteristic, which is dependent on the depth of the negative feedback used. Therefore, compensation circuits and feedback must be designed to achieve the desired gain and frequency characteristics.