Amplifier basics........

#12

Joined Nov 30, 2010
18,224
What you have there is positive feedback. The output is likely to slam to one of the power supply voltages and never move again.
If you reverse the inputs, you would have an inverting amp with a gain of 3/1 at very low frequencies, but the capacitor has an impedance equal to 159 ohms at 1 KHz. That makes the gain 3000/ 137.3 and increasing as the frequency increases.
 

Thread Starter

Nathan Hale

Joined Oct 28, 2011
159
What you have there is positive feedback. The output is likely to slam to one of the power supply voltages and never move again.
If you reverse the inputs, you would have an inverting amp with a gain of 3/1 at very low frequencies, but the capacitor has an impedance equal to 159 ohms at 1 KHz. That makes the gain 3000/ 137.3 and increasing as the frequency increases.
I am sorry, but pin 3 needs to be negative and pin 2 needs to be positive.
Wouldnt that make this amplifier an inverting amplifier?
 
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