Therefore, when the frequency of load current changes is between DC and several hundreds of KHz, the voltage regulator can be well adjusted to keep the output voltage stable. When the load transient current change frequency exceeds this range, the voltage output of the regulated source will drop, resulting in power supply noise. Today, microprocessor cores and peripherals are clocked at more than 600 MHz, and internal transistor level transition times have dropped below 800 ps. This requires that the power distribution system must respond quickly to changes in load current in the range from DC to 1GHz, but the existing regulated power supply chips cannot meet this stringent requirement. We can only compensate for this deficiency of the regulated source in other ways.