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cherry hooper amplifier

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sastry

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cherry hooper

hi

i am trying to run AC analysis for cherry hooper amplifier.The gain in dB is below zero and the response keeps on increasing for friequency upto 1000G but still does not touch 0 dB.The transient analysis looks fine.The input is amplified.What could be wrong with stimuli of AC analysis.

rgds

sastry
 

I would suspect some error in your schematic or component values. Another possibility is shortcomings in your simulation models. SPICE has very poor JFET models is an example. I have simulated a source follower that produced gains of 0.99 into the x-ray frequency range.
 

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