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Design Notes

TEMPERATURE DEPENDENT PARAMETERS IN VSS

This example demonstrates varying the devices' performance over temperature in chain of RF blocks.  This is accomplished by sweeping the environment variable for temperature, _TAMB and having the temperature dependence set up for Gain, P1dB, IP3, and NF in the AMP_B2 model.  The graphs in this project show the gain, third order intermodulation product, and noise figure over the chain of RF blocks.

Simulation Details

The block SWPVAR is used to sweep the variable _TAMB from minimum (MIN),normal (NORM), and maximum (MAX).  In turn _TAMB sets the gain, P1dB, IP3, and NF of the device.  Looking at the parameters for AMP_B2, we see that the gain at 100K is 10 dB, 15 dB at 230K, and 20 dB at 290K.  The parameters that control the temperature dependence of an RF block end in _TDEP.

Graphs

Each graph has three traces corresponding to the minimum, normal, and max temperatures.  The Blue trace corresponds to the temperature at 100 degrees Kelvin, the pink trace is 230 degrees, and the brown trace is 290 degrees Kelvin.

Graph - NF

Graph - GAIN

Graph - IP3