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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...
Will it be a discrete amplifier or integrated ?? If it will be integrated, which process you intend to use ?
If it will have discrete nature, which type of transistors you're gonna use ?
If you design carefully by paying attention the Stability, it's possible to design such LNA using with CasCode configuration with feedback.
But it's not easy.
Are they Differential in other words Coupled Transmission Lines ?
OR
They are simple 2 Identical Transmission Lines that are NOT Coupled ??
I see 2 Identical Transmission Lines/Coaxial Lines that are NOT Coupled with Z0 Characteristic Impedance. Because if they were Coupled, the author should...
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