Hello everyone,
I am new to electronics and have been experimenting with the 741 op-amp.
The op amp behaves exactly how I expect it to on multisim electronics simulator program. However when I build the circuit on breadboard it behaves differently. Below I will try to explain this difference I am getting:
On simulator:
In the attached schematic I have set the gain to 10, therefore 0.2V in should equal 2V out. And 0.4V in should equal 4V out. This is what I get, which is what I expect.
On breadboard:
When I tested using breadboard I used a variable resistor in replace of R12 (on schematic) to set a gain of 10. This worked fine as 0.2V in equalled about 2V out.
However, when I increased the input voltage to about 0.4V, I was still getting 2V out. I believe this to be incorrect behaviour.
Below are some measurements I took:
0.2V in:
Pin 2 = About 1.8V
Pin 3 = About 0.2V
Pin 6 = About 2V
0.4V in:
Pin 2 = About 1.8V
Pin 3 = About 0.4V
Pin 6 = About 2V
I really would appreciate any help on understanding this issue.
Kind Regards,
Jay
I am new to electronics and have been experimenting with the 741 op-amp.
The op amp behaves exactly how I expect it to on multisim electronics simulator program. However when I build the circuit on breadboard it behaves differently. Below I will try to explain this difference I am getting:
On simulator:
In the attached schematic I have set the gain to 10, therefore 0.2V in should equal 2V out. And 0.4V in should equal 4V out. This is what I get, which is what I expect.
On breadboard:
When I tested using breadboard I used a variable resistor in replace of R12 (on schematic) to set a gain of 10. This worked fine as 0.2V in equalled about 2V out.
However, when I increased the input voltage to about 0.4V, I was still getting 2V out. I believe this to be incorrect behaviour.
Below are some measurements I took:
0.2V in:
Pin 2 = About 1.8V
Pin 3 = About 0.2V
Pin 6 = About 2V
0.4V in:
Pin 2 = About 1.8V
Pin 3 = About 0.4V
Pin 6 = About 2V
I really would appreciate any help on understanding this issue.
Kind Regards,
Jay
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