Multi-stage MOSFET Amplifier design..

cqbrules

New Member
My lab partner and I have to build a multi-stage mosfet circuit to meet this given criteria:

Mid-band voltage gain > 35dB | Input Resistance > 10 Mohms
Output Resistance < 300Kohms | Output Signal Swing at least +/- 0.4 V

We have variable power supply voltage from -15V to +15V
We are using the ZVN3306A

I was thinking of making this configuration:

Common Source (no Rs) -> Common Source (no Rs) -> Common Drain

My question's are:
1.) Will the Common Drain be the best fit for the ouput resistance requirment?
2.) Should I include an Rs for one (or both) of the Common Source stages for a more stable circuit at the loss of some gain?
3.) Would seperating the stages with a capacitor (To make the DC calculations easier) be more detrimental to me than beneficial?
4.) Would you recommend a better configuration?

Thanks
 
No one out there can help me on this?

Any advice would be much appreciated.
 
You can do this with a common source stage followed by a direct-coupled common drain stage, with two series resistors from output to input and a cap to GND at their junction. AC couple the input.
This configuration can have a large amount of low frequency peaking if you don't use the right ratio for the two capacitors.
I don't like VNA3006A as a small-signal amplifier because of its high capacitances. If I had a choice, I might select something like SD210 or SD211.
 
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