Ok I have this question that Im finding hard to answer. I understand that you guys won't answer homework questions but all I ask is a little point in the right direction. Heres the question anyway.

An amplifier has an open-loop, gain of 10,000 and a bandwith of 2MHz. Its input and output impedances without feedback are 50Kohm and 500ohm respectively. If the gain is subsequently reduced to 50, by application of negative feedback determine
a) The new bandwidth
b)The feedback fraction Beta
c)input impedance
d) Output impedance.

I think I can work out the Feedback fraction I make it to be, 0.0199.

But Im not sure on the rest, my notes don't tell me any way of working out the new bandwith or impedances.

Please can someone help me? Any formulas or hints apprecited.

Originally posted by dave12
Ok I have this question that Im finding hard to answer. I understand that you guys won't answer homework questions but all I ask is a little point in the right direction. Heres the question anyway.

An amplifier has an open-loop, gain of 10,000 and a bandwith of 2MHz. Its input and output impedances without feedback are 50Kohm and 500ohm respectively. If the gain is subsequently reduced to 50, by application of negative feedback determine
a) The new bandwidth
b)The feedback fraction Beta
c)input impedance
d) Output impedance.

I think I can work out the Feedback fraction I make it to be, 0.0199.

But Im not sure on the rest, my notes don't tell me any way of working out the new bandwith or impedances.

Please can someone help me? Any formulas or hints apprecited.