Cut Off Frequency VS Unity Gain Frequency for Opamp and NMOS

[kevinkvliu10]

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

 

[AdvaRes]

Hi,
Please see to these llinks:
http://www.ittc.ku.edu/~jstiles/412...ncy model/The MOSFET Unity Gain Frequency.pdf
http://www.learningaboutelectronics.com/Articles/Op-amp-unity-gain-bandwidth

Cheers,
Advares