| Electronics > Beginners |
| LM741 connections with signal generator |
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| Gazmon:
Hi I have made a basic LM741 op amp circuit to test with my oscilloscope , I will supply my 741 at pins 7 and 4 with 9volt dc -+ supply’s P My question I want to use a sine wave from signal generator as my input signal at pins 2 and 3 Will this be ok? What settings would be advised as do not want to damage my sig-gen Thanks Gazmon |
| Cliff Matthews:
Post the circuit diagram, we don't use crystal balls.. |
| Audioguru:
1) The 741 opamp design is 53 years old and was designed to use a 30V supply. Some do not work with a 9V supply. They have trouble at frequencies above 11kHz. 2) You NEVER feed both inputs of an opamp with the same signal. |
| Gazmon:
Apologies it’s 15 v DC - and+ And aware that you don’t use the same signal for both inputsl, really just hoping for advice about using my signal generator at the inverting ang non-inverting inputs please I have attached the circuit |
| alsetalokin4017:
Don't be deterred from experimenting. You won't damage your function generator as long as you keep to the schematic you posted and don't try to feed 30 volts into the FG! You could put a small capacitor in series with the input to protect the FG from any DC backflow kind of errors. And there are circuits which feed the same signal to both inputs of an op-amp or comparator, at least some of the time. Experiment! Connect your oscilloscope to the output of the op amp (the "zero volts" level between +15 and -15 is your "ground" for scope and signal generator) and feed various signals into the inputs and see what happens at the output, using two scope channels, one for the input signal and the other for the output signal. Have fun, your chances of letting the magic smoke out of your signal generator are very small. |
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