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发表于 2021-1-12 15:11:09
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it's accumulation mode MOSVAR that devices always work at accumulation region.
1. when VB=0, with VG increasing, higher VG attracts electrons from NWELL to form movable negative channel.
2. when VG fixed, with VB increasing, the movable negative channel is away from Gate.
3. when VB is connected to the highest power(=VDD), the distance of Gate and movable negative channel is longest with lowest capacitance.
The accumulation mode MOSVAR exhibit best Cmax/Cmin ratio and lowest parasitic resistance, but shows poor linearity |
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