Patent ID: 11901804
Assignee: REALTEK SEMICONDUCTOR CORPORATION
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H | IPC H

Claim 14:
15. A power supplying circuit, comprising:
a first high-voltage switch configured to receive a first input voltage and generate a first node voltage at a source electrode of the first high-voltage switch;
a first low-voltage switch coupled between the first high-voltage switch and an output terminal;
a second high-voltage switch configured to receive a second input voltage and generate a second node voltage at a source electrode of the second high-voltage switch;
a second low-voltage switch coupled between the second high-voltage switch and the output terminal;
a third high-voltage switch configured to receive a third input voltage and generate a third node voltage at a source electrode of the third high-voltage switch;
a third low-voltage switch coupled between the third high-voltage switch and the output terminal; and
a controller circuit configured to control the first high-voltage switch, the first low-voltage switch, the second high-voltage switch, and the second low-voltage switch, the third high-voltage switch, and the third low-voltage switch according to the first node voltage, the second node voltage, and the third node voltage such that an output voltage is outputted to the output terminal;
wherein the controller circuit is electrically connected to the source electrode of the first high-voltage switch to receive the first node voltage;
wherein the controller circuit is electrically connected to the source electrode of the second high-voltage switch to receive the second node voltage;
wherein the controller circuit is electrically connected to the source electrode of the third high-voltage switch to receive the third node voltage; and
wherein the controller circuit comprises:
a low-voltage comparator configured to compare the first node voltage, the second node voltage, and the third node voltage to generate a first comparison result signal and a second comparison result signal; and
a low-voltage controller configured to control the first high-voltage switch, the first low-voltage switch, the second high-voltage switch, the second low-voltage switch, the third high-voltage switch, and the third low-voltage switch according to the first comparison result signal and the second comparison result signal or according to at least one enable signal.