Patent ID: 9740223
Date: 2017-08-22
CPC Classifications: G05F

Claim:
1. A regulator, comprising: a driver circuit, configured to receive an input voltage and provide an output voltage; an amplifier circuit; a first current source circuit, configured to provide a first current to the amplifier circuit; and a second current source circuit, configured to provide a second current to the amplifier circuit according to the output voltage if the output voltage deviates from a predetermined voltage; wherein the amplifier circuit is configured to control the driver circuit according to the output voltage and a third current, the third current is a sum of the first current and the second current, and the second current source circuit is further configured to provide the second current according to a first voltage difference between the output voltage and a reference voltage, and the reference voltage is the predetermined voltage; wherein if the first voltage difference is getting larger, the second current source circuit increases the second current so that the amplifier circuit increases a speed of controlling the driver circuit to reduce the output voltage.