阈值电压 Threshold voltage
（重定向自Body effect）
阈值电压（英语：Threshold voltage），又称阈电压或开启电压，通常指的是在TTL或MOSFET的传输特性曲线（输出电压与输入电压关系图线）中，在转折区中点所对应的输入电压的值。
当器件由空乏向反转转变时，要经历一个Si表面电子浓度等于电洞浓度的状态。此时器件处于临界导通状态，器件的闸极电压定义为阈值电压，它是MOSFET的重要参数之一。
Body effect
中文百科
英语百科
Threshold voltage 阈值电压
（重定向自Body effect）
The threshold voltage, commonly abbreviated as Vth or VGS (th), of a field-effect transistor (FET) is the minimum gate-to-source voltage differential that is needed to create a conducting path between the source and drain terminals.
For an nMOS device at gate-to-source voltages above the threshold voltage ((VGS > Vth) but still below saturation (less than "fully on", (VGS − Vth) > VDS), the transistor is in its 'linear region', also known as ohmic mode, where it behaves like a voltage-controlled variable resistor.
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