-2
\$\begingroup\$

How can I create an inverting amplifier configuration with a gain of 10 in lm324n op-amp integrated circuit. As lm324n has only 1 supply voltage and ground how can I get a negative voltage at the output. I tried this with non-inverting and it is working fine but the problem is with inverting configuration.

\$\endgroup\$
  • 1
    \$\begingroup\$ There are many example circuits of opamp based amplifiers to be found if you google for "opamp schematic", select to search for images (pictures) instead of just the web. Have a look at some examples and see how it's done. \$\endgroup\$ – Bimpelrekkie Oct 12 '15 at 14:34
  • \$\begingroup\$ To get a negative output you need a negative supply. The LM324 works fine with +V and -V supplies, not just with +V and Gnd. \$\endgroup\$ – Brian Drummond Oct 12 '15 at 14:40
  • \$\begingroup\$ Google "single supply opamp". Lots of results with the basics. \$\endgroup\$ – Fizz Oct 12 '15 at 21:42
1
\$\begingroup\$

Firstly the LM324 is quite happy on either single or dual supply configurations.

Secondly you can put a voltage other than ground on the non-inverting input. The amplifier will then operate relative to this voltage. So for example if you build an inverting amplifier with a gain of -10 and a voltage of 2.5V on the non-inverting input then connect 2.6V to the inverting input of your circuit you will get 1.5V on the output.

\$\endgroup\$
  • \$\begingroup\$ will it be fine even if I don't include a voltage on the non-inverting side? \$\endgroup\$ – mahesh Oct 13 '15 at 7:39
0
\$\begingroup\$

LM324 has no problem operating with dual supplies. On page 1 of the datasheet you'll see:

enter image description here

\$\endgroup\$
  • \$\begingroup\$ How can I build a integrator circuit using op-amp when I give a dc supply across the input as after the capacitor gets charged then the flow of current will stop? \$\endgroup\$ – mahesh Oct 13 '15 at 7:41

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.