... 090704 发光二极管（LED） Light-emitting diodes [LED] 090705 三极管 Triodes 090491 真空电子管（无线电） Vacuum tubes [radio] ...
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N an electronic valve having three electrodes, a cathode, an anode, and a grid, the potential of the grid controlling the flow of electrons between the cathode and anode. It has been replaced by the transistor 三极电阀
The temperature had great effect to the triodes performance and made the quiescent operation point in circuitry unstable.
温度对三极管的性能影响较大，使得电路中的静态工作点出现不稳定现象。
In the early 1950s, a new technology based on semiconductor construction would replace triodes with transistors, in cases where low-power amplification was needed.
在上个世纪五十年代初期，基于半导体结构的新技术，在需要低功率放大的情况下可用晶体管替换三极管实现这一功能。
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