can any one help me out with my proteus simulations. iam using proteus 8. iam unable to get output for triangular wave generator and astable multivibrator using opamp ua741. i hav attached the circuit diagram of both tat i used in proteus. plz anyone debug the errors i made
A real oscillator starts by amplifying its own noise. But your simulation program has no noise.
The oscillator will start if you can add some offset voltage at an input.
A real oscillator starts by amplifying its own noise. But your simulation program has no noise.
The oscillator will start if you can add some offset voltage at an input.
I think a SIM program causes this oscillator to sit calmly with the opamp inputs at 0V. Noise, input offset voltage or a good swift KICK would get it going.
I betcha that even a two-transistors multivibrator with equal value parts also will not start oscillating by itself in a SIM program.
I tried it in LTspice IV and it does not start oscillating unless the program is set for "UIC, Skip The Initial Operating Point Solution".
I think a SIM program causes this oscillator to sit calmly with the opamp inputs at 0V. Noise, input offset voltage or a good swift KICK would get it going.
I betcha that even a two-transistors multivibrator with equal value parts also will not start oscillating by itself in a SIM program.
I tried it in LTspice IV and it does not start oscillating unless the program is set for "UIC, Skip The Initial Operating Point Solution".