Figure 1: Adding a diode to the output of the operational amplifier (OP07AJ) causes the output waveform to oscillate;
Figure 2: No diode is added to the output of the op amp, the output is normal;
In addition, the signal flow in Figure 1 is based on the arrow flow in the figure (1-->2-->3-->4-->5-->6-->7 (in addition, some of the signals in 3 places go to 8 ))?
Thank you
Ander Posted on December 16, 2020
What is the string diode for? Should it be a peak detector circuit? A capacitor should be connected to the back instead of a resistor. If you connect directly in this way, it will indeed oscillate.
Imanol Posted on December 16, 2020
why?
Also, is the signal flow in the second picture correct? Thanks
Ander Posted on December 16, 2020
The flow direction is correct, but I don't know what your circuit is used for. It is a bit like a peak detector circuit. Are you playing with your own circuit test?
Landis Posted on December 16, 2020
Diodes have inductive characteristics, so oscillation is normal.
