I have a question about MOS C-V Characteristic.

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SUMMARY

The discussion focuses on the MOS C-V characteristic, specifically the behavior of inversion electrons at low and high frequencies. At low frequencies, the gate capacitance (CG) equals the oxide capacitance (Cox) due to the ability of inversion electrons to respond to AC voltage. Conversely, at high frequencies, CG is defined as Cox Cs / (Cox + Cs), resulting in a minimum capacitance (Cmin) because inversion electrons cannot respond to the AC voltage. The inquiry emphasizes the need for logical reasoning in understanding these capacitance behaviors.

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empkth
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Hello, All Outstanding electrical engineering student, I have a some question.

As posted,

1. At low frequency, the inversion electrons will be able to respond to the ac voltage
=> CG (ω= 0) = Cox (Why?).

2. At high frequency, inversion electrons are not able to respond to ac voltage
=> CG (ω=∞) = Cox Cs / (Cox + CS) =Cmin (Why?)

Please.. answer logical comments. I'm so curiosity because of these matters.
 

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Sounds like a homework problem. According to PF rules, you need to make an attempt to solve the problem before we can help. Can you tell us your thoughts on the answers?
 

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