Plot Transconductance of an OTA

Discussion in 'General Electronics Chat' started by mr_ivoryz, Feb 28, 2012.

  1. mr_ivoryz

    Thread Starter New Member

    Nov 19, 2011
    I have designed an OTA with a differential pair input (see attached image) and I was wondering what is the best way to plot out the transconductace in LTspice?

    1.) DC analysis: Would it be just be Iout/VDCin? Do I need to setup a load resistor on the output?

    2.) AC analysis: How would I plot it using an AC input?