LM324: LC Oscillator using LM324N

Please show the schematic. What frequency are you trying to generate? The LM324 might not have enough bandwidth.

Hello Clemens Ladisch,

thanks for your reply at very short notice. the schematics is attached here. i tried replacing L value to 220uH and tried to change capacitors for various values. the frequency obtained based on calculation is 100khz to 300khz.

thankyou,

regards,

Seshadri.L

100 mH or 100 µH? Power supplies?

You have set an amplification of more than 21. This would require an opamp with a GBW of 5 MHz. If you really want to use the LM324, try R2/R1 ≈ 3.

Hi Clemens Ladisch,

Once again thankyou for your reply at short notice. Can you suggest any circuit for getting minimum frequency with Inductor value being 220uH using LC Oscillator. kindly help on this one.

regards,

Seshadri.L

What power supplies do you have available? Do you need a sine wave or a square wave?

DC power supply.

Need to do the tank circuit with inductor coil ( L = 220uH ).

Need sine wave.

thank you 

regards 

Seshadri.L

Hi,

a Colpitts oscillator -especially in this frequency range- is usually built with a transistor and not with an OPAmp like the LM324.

Kai