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DC analysis of the circuit

时间:04-11 整理:3721RD 点击:
Please give me the DC analysis or any other means and equations related to the DC analysis of the circuit attached below. If possible i'd like to analyse the circuit with Thevenin and Norton Equivalent.


https://www.edaboard.com/files-eboard/1_2093.jpg

THANKS
REGARDS

DC
gate voltage Vg=R2/(R1+R2+R3)*Vbias
drain voltage Vd=50V
Current Id=k*(Vg-Vt)^2

what is the 'K' here? can u give me the thevenin analysis and norton analysis.
If i find thevenin voltage Vth for input and norton current Isc for output circuit, and then divide Vth(input) by Isc(output) will input impedance of the circuit?

Is it valid?

Thanks.
Regards.

Hi pnnavigator0915;

For DC analysis you must open circuit all capacitors and short circuit all inductors.
you circuit is very easy.

Vgs = (R2 *Vbias) / (R1 + R2 + R3)
Vds = 50V

Regards,
Davood.

k is mosfet parameter. I think that it is better to see input and output circuits as two tuned circuits.
Tuned circuit acts as some resistance Rx at the resonant freq and amplifies signal , and as short circuit at other freq(does not amplify signal). Try to determine Rx. Since amplifier is designed for 175M, resonant freq should be at 175M.

Added after 6 minutes:

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yes i dont see this
but where is description!?
it seems you think that i copy your results!?
dont worry!
any one which see this article, will find you answer before me.

:D

Regards,
Amerion.

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