Multimode high-resolution DPWM for RF class-D amplifiers

This paper describes a multimode high-resolution digital pulse width modulator.This modulator,based on a novel hybrid structure,not only has a programmable duty cycle but also realizes phase modulation.A 576 ps pulse resolution is achieved based on a 13.56 MHz switching frequency for near field comm...

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Bibliographic Details
Published in:Journal of semiconductors 2011-04, Vol.32 (4), p.93-97
Main Author: 孙立崇 朱正 闫娜 闵昊
Format: Article
Language:English
Subjects:
CMOS
CMOS工艺
Digital
DPWM
D类放大器
EEPROM
Modulation
Modulators
Near fields
Semiconductors
Switching
多模
射频
脉宽调制器
高解析度
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Summary:This paper describes a multimode high-resolution digital pulse width modulator.This modulator,based on a novel hybrid structure,not only has a programmable duty cycle but also realizes phase modulation.A 576 ps pulse resolution is achieved based on a 13.56 MHz switching frequency for near field communication.Fabricated in a SMIC 0.18-μm EEPROM CMOS process,the total area of modulator is only 130×180μm2.Measurement results validate the multi-mode modulation function and high pulse resolution.
ISSN:1674-4926
DOI:10.1088/1674-4926/32/4/045001