Hi,
I am new here, hope you can help me.

My problem: Design an amplifier with A= 100,0 at DC, and with -3db bandwith "bigger or equal to" 40Khz.
Avalible components: uA741 (op-amps) and resistors.

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Solution:
(see the drawing)

A1=A2= (27/3 + 1) = 10
A= A1*A2=100,0
100,(!)0??

GBP= 1Mhz (datasheet)
-3db frequency = GBP / A1 = GBP/A2 = 1Mhz/10 = 100Khz ???
100Khz > 40Khz , ok!

Can this be correct?
Any help or advise would be appreciated.
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*Thanks*

 

It looks good to me. Cascading low gain amplifiers is a good strategy for achieving higher bandwidth. Can you figure out what the major disadvantage is?