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在放大的情况下,晶体管用于放大信号,如声音信号的放大。左边是一个用来放大声音信号的电路的例子。进入麦克风的声音被转换成电信号,这个信号在晶体管中被放大。然后这个被放大的声音信号通过电路,直到它到达扬声器。扬声器将这个声音的电信号重新转换成声音。从音箱中发出的声音与进入麦克风的声音是完全相同的,只是更加响亮了。这就是所谓的放大 - 声音被放大了。
译者:哈尔滨工业大学(威海)电子封装 090840228-谢战胜
校对:哈尔滨工业大学(威海)电子封装 090330112-张慧颖
http://www.computerhistory.org/semiconductor/timeline/Amplification.html
Amplification
In the case of amplification the transistor is used to amplify a signal. One example of such a signal can be a sound. To the left is an example of a circuit that is used to amplify sound signals. The sound entering the microphone is converted to an electrical signal that is amplified in the transistor. This amplified sound signal then travels through the circuit until it reaches the loudspeaker. This speaker converts the electrical sound signal back into a sound. The sound leaving the speaker is the same as the sound that entered the microphone, only much louder. This is called amplification – the sound is being amplified.
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