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Imedance match for transistors working in nonlinear region (cufoff and triode)

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Does anyone one know that how to impedance match the input and interstage of a two-stage circuit? The transistors keep switching from cutoff and triode region. It is an application in design Class E power amplifier working at 433MHz.

Someone told me I should use a nonlinear simulator to get the impedance matching network parameter values. I am using Cadence, so does anyone know what function/tool in Cadence I should use for the impedance matching the input and interstage of a circuit using nonlinear transistors?

Here is the link right below I posted earlier where you can find more info about my question.

https://www.edaboard.com/threads/189437/#post792449
 

Class-E amplifiers don't work in such a way...
They work always in switching mode so hard saturation mode, not linear or triode region etc...
For these kind of amplifiers, finding an input matching network is not easy task but a "rough approximated" circuit will serve,no problem.
Output L-C circuits are very important for efficiency,harmonic levels etc. Therefore there is no way out but a nonlinear simulator preferable HB...
If you intend to build up this amplifier with 2 stages, first stage can be A or AB class but only last stage will be E-class because E-Class amplifiers are "practically" used at output stages.
 

BigBoss said:
Class-E amplifiers don't work in such a way...
They work always in switching mode so hard saturation mode, not linear or triode region etc...
For these kind of amplifiers, finding an input matching network is not easy task but a "rough approximated" circuit will serve,no problem.
Output L-C circuits are very important for efficiency,harmonic levels etc. Therefore there is no way out but a nonlinear simulator preferable HB...
If you intend to build up this amplifier with 2 stages, first stage can be A or AB class but only last stage will be E-class because E-Class amplifiers are "practically" used at output stages.
Click to expand...

Thanks for the reply. I am pretty sure that the class E output stage transistor works in cutoff and triode modes. Actually it switches between these two modes according to the RF signal applied at the gate of the transistor. Saturation region only occurs during transition which you want to avoid. Otherwise it won't be called nonlinear transistor if it works in Saturation mode.

Is there a way I can get at least basic/initial values for the L and C in the impedance matching network (input and interstage)?

I am using Class F as driver stage (see the circuit graph in the link above) because class F stage transforms sinusoid signal into square wave signal for faster transition time.
 

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