Hello,
Well, I have experimented only with non-inverting configurations using the lm324 op amp.
I just decided to add a voltage divider at the non-inverting input. Why? Because I am exploring and experimenting. So, now, I am not sure if we can still call this configuration an non inverting op amp configuration?? I think we do... but not sure.
The point is, I have done an inverting op amp circuit in the attachment below and it works fine. I put in 4vdc at the non-inv input and out comes 5vdc.
I figured it out intuitively and using the differential amplifier formula and it matches. Then I tried, to calculate vout using the common mode voltage and differential gain formulas but the output came to 8 volts instead???
** QUESTIONS **
1) Given the way the opamp is connected in the circuit below, is it okay to calculate such a circuit using the common mode/differential gain formulas as we were atemping to do in my previous thread?
2) If so, why am I getting 8v instead of 5v?
thanks
Well, I have experimented only with non-inverting configurations using the lm324 op amp.
I just decided to add a voltage divider at the non-inverting input. Why? Because I am exploring and experimenting. So, now, I am not sure if we can still call this configuration an non inverting op amp configuration?? I think we do... but not sure.
The point is, I have done an inverting op amp circuit in the attachment below and it works fine. I put in 4vdc at the non-inv input and out comes 5vdc.
I figured it out intuitively and using the differential amplifier formula and it matches. Then I tried, to calculate vout using the common mode voltage and differential gain formulas but the output came to 8 volts instead???
** QUESTIONS **
1) Given the way the opamp is connected in the circuit below, is it okay to calculate such a circuit using the common mode/differential gain formulas as we were atemping to do in my previous thread?
2) If so, why am I getting 8v instead of 5v?
thanks
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