Cut Off Frequency VS Unity Gain Frequency for Opamp and NMOS

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kevinkvliu10

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Hi,

I am a little confused with the definition of the cutoff frequency and unity gain frequency.
For my understanding, unity gain frequency is the frequency at gain equals to 1 and cutoff frequency is 3dB below 0 dB.
I have been searching these two for an NMOS and OpAmp, but seems like the ways of calculation for both cutoff and unity gain frequency of a NMOS are the same?
Are they the same but in different ways of explaining?

Thanks in advance for helping me out!

Kevin
 

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