This is a filter in voltage feedback, but how to analyze the function of this filter? What type of filter is it?
Zavier 發表於 December 16, 2020
1. This circuit is obviously a voltage loop and current loop in a switching power supply control loop circuit. The voltage loop and current loop are essentially a PI circuit. Everyone knows that the PI circuit is composed of an integral circuit and a proportional amplifier circuit.
2. The integral circuit is an integral summation from the time domain point of view, and a low-pass filter from the frequency domain point of view. There is nothing wrong with this, but we analyze the function of the circuit from the system point of view. From the system point of view, the above Circuits are voltage loops and current loops. Mentioning this word, anyone who knows the power supply knows what it is, but if the integral circuit is a filter circuit, there is no way to analyze the circuit from a system perspective.
Savion 發表於 December 16, 2020
Are you not a voltage loop?
Javion 發表於 December 16, 2020
It is a voltage loop, just want to ask, how to analyze the filter circuit formed by the amplifier on the left side of the voltage loop? What kind of filter.
Mikel 發表於 December 16, 2020
RC filter to prevent interference signals from being detected by ADC.
