100 times op amp demo

118

02:42:54

The input represents a mic , powered by 9v , modulating the signal by 20mv.
This is amplified 100 times by the op amp. ( LM324)  giving out a 2v peak to peak ( +1v to -1v )
Switch on and off the oscilloscope ( the eye button ) to see the signals.

published 9 years ago

FitFat

9 years ago

What kind of plan do you have to supply negative power?

FitFat

9 years ago

And the gain was set to by 101 times multiplying by resistors, but you have gotten only about 50.5 times multiplying. No need to decrease the gain of the attribute of op-amps usually.

scuba_2

9 years ago

I'm just learning and assumed the gain was +50 to -50 ? For power was going to use two 9v battery's and a couple of capacitors.

FitFat

9 years ago

OK. This is an example for simple 100 times multiplying amplifire circuit ( http://everycircuit.com/circuit/4814084182114304 ). The circuit gain is not related to the gain of op-amps. This sample require + and -, 2 powe supplies. Output voltages are limited between + and - power supplies usually. Especially, in the case of LM324, the max voltage might become little bit lower than the + supply. Hope your better.

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