Patent ID: 11860709
Assignee: REALTEK SEMICONDUCTOR CORPORATION
Field: Computer technology (Electrical engineering)
Classification: CPC G | IPC G

Claim 3:
4. The power supply apparatus of claim 1, further comprising a feedback voltage generation circuit, comprising:
a control transistor having a control current when being conducted;
a comparator having two input terminals and an output terminal, the two input terminals being respectively electrically coupled to a drain of the switch transistor and a drain of the control transistor, the output terminal being electrically coupled to the drain of the control transistor, such that the control current and the operation current have a fixed ratio therebetween; and
a current mirror having a first current output terminal and a second current output terminal respectively electrically coupled to the drain of the control transistor and an output resistor, so as to mirror the control current to the output resistor and generate the feedback voltage at the second current output terminal.