Electronic – Is transconductance concept more important for FETs than in BJTs

transconductance

In some texts I encounter they mention transconductance when it comes to FETs not BJTs. I have seen myself many texts and skimmed through them, the word transconductance does not appear until FETs. Before they teach BJTs and they use hfe and other parameters but not gm.

For BJTs they do not necessarily menton transconductance, instead they use hfe i.e forward current transfer ratio.

Having said that, I also saw some tutorials which use the transconductance when they teach BJTs.

Could there be a reason to employ transconductance concept more for FETs than in BJTs?

Best Answer

Universally, you need the gm (transconductance) to compute the stage amplification. For tubes, bipolars, FETs.