Hello everyone, the problem is this. A signal with a positive or negative amplitude of 12V and a frequency of 10KHz passes through the voltage follower and the signal waveform changes. The front and rear edges of the square wave signal become slower. The positive voltage drops to very small. The voltage follower is composed of LM158 chip. (Various methods have been tried ,like the grounding resistance has been tried 10K or the resistor is not connected). However, the output waveform is still changed from a square wave to a triangular wave.
What caused this result?
The bandwidth of the LM158 is large enough: Unity-Gain Bandwidth of 1.2 MHz
(the op amp is connected to the positive and negative power supply)
Thank you !
Voltage follower circuit diagram
Voltage follower output signal waveform