What are the reasons of signal distortion in IC and how to minimize it?

[jutek]

hello

what are the reasons of signal distortion in IC and what are the ways to minimize it?

i mean generally not particular circuit.

regards

 

[hubert008]

signal distortion

sometimes, the nonlinear will cause the distortion.

 

[yibinhsieh]

Re: signal distortion

The power or ground plane is not good. The reference is coupled to distored by other circuits.

Yibin.

 

[heartwide]

Re: signal distortion

Hi jutek

signal distortion have several reasons including THD.IMD.Nonlinearity and so on.For examples, the relationship between current and voltage of transistors are not linearity,especially in case of large signal acts,which cause THD. Meanwhile,the common mode voltage,that determine dc opration point, would introduce Nonlinear
errors when set up inappropriate.

that is my little view

 

[edisonliu]

Re: signal distortion

Hi heartwide,
What does setting up inappropriate mean?
Thanks!

 

[laglead]

Re: signal distortion

Make signal path linear.

 

[nxing]

signal distortion

All of the distortion can be related to linearity, although there are many ways to cause the bad linearity.

 

[gte582w]

Re: signal distortion

Fundamentally, it will at least have sth to do with the inherient nonlinear
I-V relations either for CMOS, BJT, GaAs etc. Feedback is a very effective
way to reduce it, recall, for example, source degeneration.

 

[q0w1e2r3]

Re: signal distortion

mainly non-linearity.solution : feedback,high dc gain ,layout issues,charge injection and many many