Patent ID: 11876466
Assignee: ANPEC ELECTRONICS CORPORATION
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. A motor controlling circuit, which is applicable to a motor, comprising:
a bridge circuit including a plurality of transistors, wherein the plurality of transistors includes:
a first high-side transistor, wherein a first terminal of the first high-side transistor is coupled to a common voltage;
a first low-side transistor, wherein a first terminal of the first low-side transistor is connected to a second terminal of the first high-side transistor, a second terminal of the first low-side transistor is grounded, and a first node between the first terminal of the first low-side transistor and the second terminal of the first high-side transistor is connected to a first terminal of the motor;
a second high-side transistor, wherein a first terminal of the second high-side transistor is coupled to the common voltage; and
a second low-side transistor, wherein a first terminal of the second low-side transistor is connected to a second terminal of the second high-side transistor, a second terminal of the second low-side transistor is grounded, and a second node between the first terminal of the second low-side transistor and the second terminal of the second high-side transistor is connected to a second terminal of the motor;

a driver circuit connected to a control terminal of each of the plurality of transistors and configured to turn on or off each of the plurality of transistors;
a controller circuit connected to the driver circuit and configured to control the driver circuit; and
a feedback circuit including an operational amplifier, wherein a first input terminal of the operational amplifier is connected to the second node between the first terminal of the second low-side transistor and the second terminal of the second high-side transistor, a second input terminal of the operational amplifier is coupled to the common voltage, and an output terminal of the operational amplifier is connected to the control terminal of the second low-side transistor.