how to simulate the linearity of transconductor

[jingxuelu]

Hi,
How to simulate the linearity of transconductor? If loaded the tranconductor by capacitor, it turns to be gm-c integrator, and the ouput has been integrated,including the dc offset . The result is not accurate, i guess. SO is that means i have to put resistor as load to simulate the linearity of the tranconductor?

 

[jody]

wha the spice you use to simulate it or you intend to using?

 

[jingxuelu]

spectre in ic6.x

 

[LvW]

The linearity of an amplifying device is simulated by a dc analysis.
In your case (OTA) it is the output current as a function of input voltage.
To enable an output current a load resistor of suitable value (some kohms) has to be connected. Don´t use a load capacitor !