一、放大器的曲型电路及增益一个规范而流行的音频功率放大器,应尽可能地做到标准化,这对于设计和制作来说是非常重要的。图1为传统 B 类(乙类)功率放大器和以小信号 A 类(甲类)输出射极跟随器代替 B 类(乙类)输出所得到的模型放大曲型电路。由图可见,输入差分对管是少数实用电路程式中的一个,其作用在于降低失直指标,且 First, the amplifier circuit and gain the music A standard and popular audio power amplifier, should be standardized as much as possible, which is very important for the design and production. Figure 1 shows a conventional model B (Class B) power amplifier with a small signal type A (Class A) output emitter follower instead of a Class B (Class B) output. As can be seen from the figure, the input differential pair is one of the few practical circuits, and its role is to reduce the loss of straightness index, and