Amplifying circuit and charging method which can improve abnormal sound
AssigneeRealtek Semiconductor Corp.
InventorTzu-Chieh Wei
Life of this patent
Estimating the term…
Abstract
An amplifying circuit, comprising: a charging circuit, comprising a plurality of first transistors electrically coupled to a target device; and an output circuit, comprising a plurality of second transistors electrically coupled to the target device. After at least one of the first transistors turns on and the second transistors turn off such that the charging circuit charges the target device to a predetermined voltage, at least one of the first transistors and at least one of the second transistors simultaneously turn on for a predetermined time, and then at least one of the second transistors turns on but the first transistors turns off.
Claims12
An amplifying circuit adapted for electrically coupling to a target device, the amplifying circuit comprising:
- a charging circuit, comprising a plurality of first transistors electrically coupled to the target device;
- and
- an output circuit, comprising a plurality of second transistors electrically coupled to the target device;
- wherein after at least one of the first transistors turns on and the second transistors turn off such that the charging circuit charges the target device to a predetermined voltage, at least one of the first transistors and at least one of the second transistors simultaneously turn on for a predetermined time, and then at least one of the second transistors turns on while the first transistors turns off;
- wherein the output circuit is a class AB amplifier.
A charging method, applied to a charging circuit comprising a plurality of first transistors and an output circuit comprising a plurality of second transistors, comprising:
- (a) controlling at least one of the first transistors to turn on and the second transistors to turn off such that the charging circuit charges a target device to a predetermined voltage;
- (b) controlling at least one of the first transistors and at least one of the second transistors to simultaneously turn on for a predetermined time, after the step (a);
- and
- (c) controlling at least one of the second transistors to turn on and the first transistors to turn off, after the step (b);
- wherein the output circuit is a class AB amplifier.
Dependencies are inferred from the claim text.