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Driver circuit for a power stage of a class-d amplifier

A driver circuit, class D amplifier technology, applied in amplifiers, low frequency amplifiers, audio amplifiers, etc., can solve the problem of high component cost

Active Publication Date: 2017-03-08
NXP BV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the component cost of a conventional drive arrangement can be quite high

Method used

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  • Driver circuit for a power stage of a class-d amplifier
  • Driver circuit for a power stage of a class-d amplifier
  • Driver circuit for a power stage of a class-d amplifier

Examples

Experimental program
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Embodiment Construction

[0029] It will be readily appreciated that the components of the embodiments as generally described herein and shown in the drawings can be arranged and designed in a wide variety of different configurations. Accordingly, the following detailed description of various embodiments as represented by the accompanying drawings is not intended to limit the scope of the present disclosure, but merely represents various embodiments. While the various aspects of the embodiments are presented in drawings, the drawings are not necessarily drawn to scale unless specifically indicated.

[0030] The described embodiments should be considered in all respects as illustrative only and not restrictive. Accordingly, the scope of the invention is indicated by the appended claims rather than by this detailed description. All changes that come within the meaning and range of equivalency of the claims are to be embraced in the scope of the claims.

[0031] Reference throughout this specification t...

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Abstract

Embodiments of a driver circuit for a power stage of a class-D amplifier and a class-D amplifier are described. In one embodiment, a driver circuit for a power stage of a class-D amplifier includes serially connected transistor devices connected to a gate terminal of a power transistor of the power stage of the class-D amplifier, a voltage generator connected between a gate terminal of a first transistor device of the serially connected transistor devices and a source terminal of the power transistor, and a current multiplier connected between the gate terminal of the power transistor and one of a source terminal and a drain terminal of the first transistor device. The current multiplier is configured to produce an output current that is proportional to a current at the one of the source terminal and the drain terminal of the first transistor device.

Description

technical field [0001] The present invention relates to a driver circuit for a power stage of a class D amplifier. Background technique [0002] Class D amplifiers can be used in consumer and automotive devices to achieve good signal quality, high output power, high efficiency and long battery life for mobile or automotive applications. For example, Class D amplifiers can be used in personal computing devices such as mobile phones, hearing aids, and audio systems such as home theater systems, powered speakers, subwoofers, and bass amplifiers. [0003] A class D amplifier typically includes a driver arrangement that generates drive signals for power transistors in the power stage of the class D amplifier. Conventional driver arrangements for power stages of class D amplifiers typically require a bootstrap capacitor or a charge pump voltage for generating a reference voltage. Furthermore, conventional driver arrangements for power stages of class D amplifiers typically have ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03F3/185H03F3/217
CPCH03F3/185H03F3/217H03F2200/03H03K17/063H03K2217/0081H03F3/2171H03F1/0211H03F3/211H03F2203/21109
Inventor 格特恩·范霍兰帕特里克·约翰·泽兰雅克布斯·霍弗特·斯尼普
Owner NXP BV