Patent ID: 11968503
Assignee: SHANGHAI AWINIC TECHNOLOGY CO., LTD.
Field: Measurement (Instruments)
Classification: CPC H  G | IPC G  H

Claim 2:
3. The current detection circuit according to claim 2, wherein the first current detection sub-module comprises a first switch, a second switch, a first comparator, a first power transistor, a second power transistor, a third power transistor and a fourth power transistor, wherein
a first terminal of the first switch is connected to the first speaker output terminal, and a second terminal of the first switch is connected to a non-inverting input terminal of the first comparator;
a first terminal of the second switch is grounded, and a second terminal of the second switch is connected to the non-inverting input terminal of the first comparator;
an inverting input terminal of the first comparator is connected to a joint at which the first power transistor is connected to the fourth power transistor;
an output terminal of the first comparator is connected to a gate of the first power transistor;
a source of the first power transistor is connected to a first terminal of the fourth power transistor, and a drain of the first power transistor is connected to a drain of the second power transistor;
a second terminal of the fourth power transistor is connected to a voltage input terminal, and a third terminal of the fourth power transistor is grounded;
the voltage input terminal is connected to a first joint at which a source of the second power transistor is connected to a source of the third power transistor; and
the drain of the second power transistor is connected to a second joint at which a gate of the second power transistor is connected to a gate of the third power transistor.