Increasing the time resolution of a pulse width modulator in a class D power amplifier by using delay lines
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 resolu...
| Main Authors: | , , |
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| Format: | Article |
| Language: | deu |
| Published: |
Copernicus Publications
2014-11-01
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| Series: | Advances in Radio Science |
| Online Access: | http://www.adv-radio-sci.net/12/91/2014/ars-12-91-2014.pdf |
| Summary: | 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. |
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| ISSN: | 1684-9965 1684-9973 |