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No, .
But if you want to see how an input Impedance is changing by time, you can use Envelope Simulation based on Harmonic Balance.
You measure complex voltage and current at a node then divide this two quantities to find input impedance.
This method is frequently used in switched RF Power...
Simple...
Terminate the Input by 50 Ohm and connect SA to the Output. Even-tough the amplifier is not properly biased, you can see the oscillation if there is.
Perhaps the transistor biasing is swinging due to eventual oscillation ?? Are you sure ?
OK, I missed the port impedances. You set Port1 to 600 Ohm, Port2 to 50 Ohm.
You cannot do that. Spectre n-port device accepts-IMHO- Touchstone or similar s-parameters definition format and there is only ONE Port Impedance in it.
So you should enter either 50 Ohm OR 600 Ohm but not both. If you...
It's an interpolation problem. You have to simulate your RLC circuit with smaller frequency steps.
Because Spectre interpolates s-parameters during frequency band and this error occurs in second simulation testbench.
Don't be afraid, use much smaller frequency steps to get much healthy results.
There is sequence that must be strictly followed up for biasing GaN RF transistors. Have you conformed this ??
Otherwise the transistor blows due to excess drain current.(particularly it occurs when the gate bias is applied as 0 volt with Vds is presented)
ESD Devices will not be functional under normal operating conditions. Their performances are just measured not simulated.
So, you don't need a model for them. Some important parameters are given (capacitances, breakdown voltages etc.) otherwise models of a ESD device is useless.
Using ESD Diodes is pretty simple. Cathodes are connected to VDD, Anodes are connected to GND.
They are just use to protect the rest of circuit against ESD zapps. If you want to get more information, refer to PDKs documents.
There might be some variants regarding to using purposes but principle...
OK, Differential CasCode configuration with Source regeneration might give you a desired or near to wanted results.
Here the problem is the stability. at higher Power Gain.
Why I say differential, because make a differential amplifier stable is easier. Also obtaining Low Noise specification with...
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