Continue to Site

Welcome to EDAboard.com

Welcome to our site! EDAboard.com is an international Electronics Discussion Forum focused on EDA software, circuits, schematics, books, theory, papers, asic, pld, 8051, DSP, Network, RF, Analog Design, PCB, Service Manuals... and a whole lot more! To participate you need to register. Registration is free. Click here to register now.

problem with differential pair

Status
Not open for further replies.
I want to calculate linearity for a simple differntial pair. after that increase linearity with some methods and compare results. in many papers I saw that they draw gm for linearity and in some books gm is defined d(id1)/d(vid). is there any other way for calculating linearity or this is the only one?
 
Last edited:

I want to calculate linearity for a simple differntial pair. after that increase linearity with some methods and compare results. in many papers I saw that they draw gm for linearity and in some books gm is defined d(id1)/d(vid). is there any other way for calculating linearity or this is the only one?

Linearity and the slope gm are different quantities.
You have a good linearity if the slope is relatively constant over a certain range of amplitudes.
But the degree of linearity depends on the required or desired amplitude range.
For example: As can be seen in the graphic from Keith the linearity is rather good for amplitudes of (+-) 30...40 mV
 

Linearity and the slope gm are different quantities.
You have a good linearity if the slope is relatively constant over a certain range of amplitudes.
But the degree of linearity depends on the required or desired amplitude range.
For example: As can be seen in the graphic from Keith the linearity is rather good for amplitudes of (+-) 30...40 mV

can you explain more?
 

Status
Not open for further replies.

Part and Inventory Search

Welcome to EDABoard.com

Sponsor

Back
Top