Multi-Temperature simulation

In a circuit there are two transistors operating in different temperatures.
How I can simulate behavior of this circuit? The problem is that circuit simulator (ADS) accepts just one parameter (temp) for temperature of all components in the circuit.

I don't know ADS but Spice allows for the temperature of individual devices to be specified with TEMP=xxx in the .model statement so I guess ADS will support that.

Keith.

Is there 1m between the transistors ?

I would have thought if one device dissipated significant power it could easily cause a temperature differential.

Keith

In this case, you should use 2 model box for each transistor eventough they are identical and each model box has variables such as "temp1" and "temp2 in "temperature" field.Don't use "Temp" as a variable because it's reserved by ADS.On the top level schematic, change these variables as you wish.