small-signal theory

例句：

1. 1. The small-signal theory suggests that the effect of a stimulus is proportional to its intensity.
   小信号理论表明，刺激的效果与其强度成正比。
2. 2. In small-signal theory, the strength of a signal is directly proportional to its amplitude.
   在小信号理论中，信号的强度与振幅成正比。
3. 3. The small-signal theory has been widely applied in communication systems and wireless networks.
   小信号理论已被广泛应用于通信系统和无线网络中。