I have the following OTA which I think is not fully differential. If I use DC sweep of differential input voltage nodes, what should I do with the 1.8V bias voltage source at one of the input voltage node ?
What about AC method of determining transconductance for my OTA circuit below ?
I read from the various posts above, I have few options to connect the output node to, which are load resistor, load capacitor, or just a bias voltage such as middle of supply voltage.
Could anyone further advise ?
Note: this OTA circuit should be seen as gm-cell which is part of a larger gyrator circuit implementation of active inductor, so I wonder how I would measure the transconductance given that it is frequency-dependent as well ?
Further details of this active inductor could be found at
http://www.designers-guide.org/Forum/YaBB.pl?num=1504336936