1
\$\begingroup\$

What exactly does it mean when we say 'increase the transconductance of a mosfet'? What is the advantage of having a high transconductance mosfet?

\$\endgroup\$

1 Answer 1

1
\$\begingroup\$

A MOSFET is a transconductance device in that an input voltage controls an output current or, in terms of gain, current out / voltage in. Current/voltage is conductance and the word "trans" is placed in front of the word "conductance" to imply the main operating parameter of such a device.

So a device with more transconductance means that it produces a bigger change in output current for a change in input voltage. Not always desirable of course but pretty useful in a lot of applications.

\$\endgroup\$
2
  • 1
    \$\begingroup\$ High transconductance means fewer stages of gain, or quicker switching (speed being gm/C). \$\endgroup\$ Jun 5, 2017 at 13:54
  • \$\begingroup\$ @analogsystemsrf Are you saying that a higher transconductance rating on the datasheet corresponds with lower "gain"? \$\endgroup\$
    – NTDLS
    May 9, 2018 at 2:24

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service and acknowledge that you have read and understand our privacy policy and code of conduct.

Not the answer you're looking for? Browse other questions tagged or ask your own question.