Check the stability of the control loop, such as an operational amplifier circuit, pulse load used, and related output voltage changes. The pulse load may be a pulse or a step-change load current. The output of the operational amplifier circuit should be connected to a series R-C circuit (such as 10k/0.01μf). The greater the circuit swing or vibration, the worse the stability of the circuit. This process is often referred to as "popping" output.
If you are interested in the operational amplifier, you can follow the link below about the operational amplifier MC1458N.
https://www.utmel.com/components/mc1458n-operational-amplifier-pinout-specification-and-datasheet?id=123