Design an amplifier that has adjustable output impedance and the range of impedance should be 1K<ri<10K. Voltage gain of the amplifier should be set to 5.
Use an Operational Amplifier, a JFET or a BJT and peripheral passive components to realize the Project.
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I have got several concepts in my mind but when I simulate them they all failed
And I can't find a way to build this kind of a circuit
Any of you know a concept about this circuit
It is a midterm project and has got due date at 09.01.08 so I am in a little bit a rush
I constracted a circuit but not simulated tomarrow I will simulate and also constract it in labratory
It is very basic non-inverting amplifier with gain for this I will use 100k and 400k as Rf and Rk so my gain gone be 5
Following I will connect 10K at one branch and parllel to this branch a pot [vary between 10k-200k] + 900ohm resistor
So when pot is off or r=0 then 1 have 0.9K ohm output resistance and when pot reach 200K ohm I will have 9.8Kohm also when pot 110K ohm I will have 9.1K[not remember exactly]
Any way I planning to simulate this circuit in following hours I will post a diagram and outputs...