Nonlinearity question

[ethan]

Dear all,

recently, I got a phone interview question regarding "what is nonlinearity" and "which technique to reduce nonlinearity in Analog or Mixed-signal or RF IC design"? (I am fresh graduate)

I anwsered the techniques to reduce nonliearity;

1.source degeneration
2. feedback.

But this is not completed and I forgot others. After that, I checked Razavi Analog IC book, and found that

3. perform "post-correction" to linearize voltage amplifier.
4. use MOSFET operating in the triode region to provide a linear Id/VGS characteristics.

Can anybody tell me whether this completes the answer or not? appreciate.

ethan

 

[ethan]

this is an interview question

Anybody would like to help me out?

 

[safwatonline]

1- feedforward
2- fedback (positive and negative)
3- picewise approximation
4-pre-distiortion