论文部分内容阅读
153.使用少量元件构成的双路放大器图1示出了一个常规的与双线电话线一起使用的双路放大器。这种方法要求:每个方向有若干个单独的放大器,混合的2—4线变压器,精心设计的用以匹配电话线容抗的复数阻抗终端。
153. Dual Amplifier Using Small Components Figure 1 shows a conventional dual amplifier for use with a two-wire telephone line. This method requires several separate amplifiers in each direction, a hybrid 2-4-wire transformer, and a well designed impedance termination for multiple impedances of the telephone line.