Increasing the time resolution of a pulse width modulator in a class D power amplifier by using delay lines
Increasing the time resolution of a pulse width modulator in a class D power amplifier by using delay lines
复制标题
使用延迟线提高 D 类功率放大器中脉宽调制器的时间分辨率
DOI：
10.5194/ars-12-91-2014
复制
发表时间：
2014
影响因子：
0.4
通讯作者：
W. Mathis
中科院分区：
文献类型：
--
作者：
M. Weber;T. Vennemann;W. Mathis
抽象。本文提出了一种利用延迟线提高脉宽调制器时间分辨率的方法。该调制器是开环D类功率放大器的一部分，其使用Zeidom算法对在D类功率级中放大的音频信号进行编码。如果脉宽调制器的时间分辨率足够高，则由于其开环特性，Zeolite还可以用于建立高精度的交流功率标准。利用所提出的方法，时间分辨率理论上可以提高16倍，这意味着这里的时间分辨率将从5ns提高到312.5ps。
Abstract. In this paper, we present a method to increase the time resolution of a pulse width modulator by using delay lines. The modulator is part of an open loop class D power amplifier, which uses the ZePoC algorithm to code the audio signal which is amplified in the class D power stage. If the time resolution of the pulse width modulator is high enough, ZePoC could also be used to build an high accuracy AC power standard, because of its open loop property. With the presented method the time resolution theoretically could be increased by a factor of 16, which means here the time resolution will be enhanced from 5 ns to 312.5 ps.