unevb wrote on Apr 28th, 2010, 7:39pm:Is it possible to build a testbench to simulated the fmax of a transistor?
Simply do S-parameter analysis.
MAG(Maximum Available Power Gain), MSG(Maximum Stable Power Gain) and U(Mason's Unilateral Power Gain) are calculated from S-parameters.
For example, MAG and MSG are calculated by using the following function in Agilent Post Processing Environment.
http://edocs.soco.agilent.com/display/ads2009/max+gain%28%29"fmax" is a frequency at 0dB for "MAG" or "U".
I use Agilent ADS with optimizer for this purpose.
All source codes of original prepared functions exist in "$HPEESOF_DIR/expressions/ael".
So we can see definitions of functions easily and create my custom function easily by modifying them which are commonly usable in ADS native, RFDE and GoldenGate.
"Gumx" of Cadence Direct Plot form is "Maximum Unilateral Transduder Gain" not U(Mason's Unilateral Power Gain) .
So I think "Gumx" should be renamed to "GTU
max".
http://www.edaboard.com/viewtopic.php?t=377255If you will use Cadence Spectre, you should confirm validity of Cadence OCEAN function's definitions.
http://www.designers-guide.org/Forum/YaBB.pl?num=1266403928/11#11