学术
摘 要:
提出了一种新型的适用于DC-DC变换器的混合式数字脉宽调制器.该脉宽调制器基于混合环路振荡器/计数器的结构.与已有的延迟线/计数器结构相比,由于该数字脉宽调制器采用了温度/工艺补偿技术和一种新型的数字控制器,使其不仅可为DC-DC变换器提供一个不随温度/工艺角变化的时钟,而且可以工作在更高的时钟频率,适用于高频应用场合.后仿结果表明该混合式数字脉宽调制器工作的时钟频率可达到156.9 MHz ,并且在0 ～100℃的温度范围内及所有工艺角下的最大偏移只有±9.4 %.[著者文摘]
文章出处:
《半导体学报》-2008年29卷2期 -275-280页
栏目信息:
分 类 号:
文献标识码:
A
文章编号:
0253-4177（2008）02-0275-06
A Novel Hybrid DPWM for Digital DC-DC Converters
Chen Hua, Li Shun, Niu Qi, Zhou Feng （State Key Laboratory of ASIC＆System, Fudan University, Shanghai 201203, China）
Abstract:
We present a new hybrid digital pulse-width modulator （DPWM） for digital DC-DC converters that employs a ring-oscillator/counter structure. Based on a temperature/process compensation technique and a novel digital controller, the proposed DPWM can not only offer temperature/process-independent pulse widths, but also operate at a much higher clock frequency than the existing delay-line/counter DPWM structure. Post-simulation results show that with our DPWM, the system clock frequency reaches 156.9MHz while the worst variation,in a temperature range of 0 to 100℃under all process corners,is only± 9.4%.[著者文摘]
Key words:
DPWM; ring oscillator; DC-DC converter
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