I would like to make an oscillator with operational amplifier.

Thread Starter

Mariachi

Joined Jan 4, 2021
27
Hello!
I would like to make an oscillator with operational amplifier, and to use a JFET in the negative feedback loop. What is needed at the output of the circuit is not displayed. Do you know what the problem or a solution would be?
 

Attachments

AlbertHall

Joined Jun 4, 2014
11,506
That circuit should definitely oscillate so something else is wrong.
Is this circuit only in a simulator or is it a real circuit?
If it is a real circuit then you probably need a new '741 after the reversed power.
 

Thread Starter

Mariachi

Joined Jan 4, 2021
27
That circuit should definitely oscillate so something else is wrong.
Is this circuit only in a simulator or is it a real circuit?
If it is a real circuit then you probably need a new '741 after the reversed power.
It's just a simulation. Maybe I'm doing something wrong.
 

Attachments

Audioguru again

Joined Oct 21, 2019
3,543
Your antique 741 opamp does not oscillate because you did not "kick it" with a startup command in the simulation.
The + input of the opamp is at 0V and the gain is 1+ (100k/47k)= 3.13 times so its output should be 0V not 10V.

You said its output is "in 10V". Is it +10V or is it -10V?
 
Top