Switching frequency of transistor

[qasim_ee]

I wish to get a clarify the understanding of switching frequency of transistor
Say, the input signal is 16 Gb/s fed to an inverter, Can we call the switching frequency of transistors in a circuit to be 16 GHz? I understand that the Nyquist frequency will be 8 GHz. But what about switching frequency and (or) data rate frequency ?
Also when the input signal is 16 Gb/s does the transitions of signal (from high to low or vice versa) have a correlation with twice the Nyquist frequency ??
Thank you!!

 

[KlausST]

Hi,

Pleae give the dicument you refer to.
Usually there is some context explaining some details.

I don't see what nyquist has to do with transistor switching frequency.
And how switching frequency relates to datarate depends on data coding.

Klaus

 

[ThisIsNotSam]

Transistor switch is usually given in time, not in frequency or bandwidth. Not sure what you are asking.

 

[qasim_ee]

Transistor switch is usually given in time, not in frequency or bandwidth. Not sure what you are asking.

Yes, I understand that the transition of voltage levels usually given in time domain i.e. rise and fall time of the output signal. If the input (data-rate) of an inverter is 16-Gb/s then accordingly the switching of NMOS-PMOS will take place [i.e. high to low/low to high level transition in time domain]. For this NRZ signal, the Nyquist frequency is 8-GHz.
I wish to know more about the crossover points in high to low/low to high level transitions [I agree this is in time domain] but does this has any relation with twice the Nyquist frequency i.e. 16-GHz, can 16-GHz be called data rate frequency or switching frequency?