What is meant by device variability ?

[vetriece86@gmail.com]

Hi all,

could someone explain,

What is meant by device variability in transistors ?

Is device variability and process variation are same ?

Thanks in advance.

 

[Audioguru]

I would think that "device variability" is the difference of one transistor part number (no variation of the process) producing some transistors with a high current gain and others with a low current gain.

Process variation would be making a transistor part number with a process that creates high frequency but low current transistors and making another transistor part number using a different process that creates low frequency but high current transistors.