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

Claim 0:
1. 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; 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 according to the first node voltage and the second 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 comprises:
a low-voltage comparator configured to compare the first node voltage and the second node voltage to generate a comparison result signal;
a low-voltage controller configured to control the first high-voltage switch, the first low-voltage switch, the second high-voltage switch, and the second low-voltage switch according to the comparison result signal or at least one enable signal; and
an inverter configured to receive a control signal and generate an inversion control signal according to the control signal,
wherein the control signal is configured to control the first low-voltage switch, and the inversion control signal is configured to control the second low-voltage switch; and
wherein when the first node voltage is higher than the second node voltage and a difference between the first node voltage and the second node voltage is greater than a threshold voltage, the low-voltage comparator outputs the comparison result signal with a first logic value.