A 3.4 W Digital-In Class-D Audio Amplifier in 0.14 μm CMOS

被引：23
|
作者：
Dooper, Lutsen [1 ]
Berkhout, Marco [1 ]
机构：
[1] NXP Semicond, Nijmegen, Netherlands
来源：
IEEE JOURNAL OF SOLID-STATE CIRCUITS | 2012年 / 47卷 / 07期
关键词：
Digital-analog conversion; power amplifier; pulse width modulation; sigma delta modulation;
D O I：
10.1109/JSSC.2012.2191683
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
In this paper a class-D audio amplifier for mobile applications is presented realized in a 0.14 mu m CMOS technology tailored for mobile applications. The amplifier has a simple PDM-based digital interface for audio and control that requires only two pins and enables assembly in 9-bump WL-CSP. The complete audio path is discussed that consists of a Parser, Digital PWM-controller, 1-bit DA-converters, analog feedback loop and the Class-D power stage. A reconfigurable gate driver is used that reduces quiescent current consumption and radiated emission.
引用
收藏
页码：1524 / 1534
页数：11
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