The test of characteristic curve for input and output of crystal triode is one of the most basic experiments in simulating electronic technology.

晶体三极管的输入、出特性曲线测试，是模拟电子技术最基本的实验之一。

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To create the point-contact transistor, Shockley's team modified the cat's whisker by placing two fine metal wires close together on the surface of a germanium crystal, turning it from a diode into a triode.

ECONOMIST: The middle age of the transistor

But a few researchers, seeing the analogy between them, tried to put a grid into the crystal detector to turn it, too, into an amplifying triode.

ECONOMIST: The middle age of the transistor