一种基于迟滞比较器的锯齿波产生电路A sawtooth wave generation circuit based on hysteresis comparator
魏荷坪,孙江,陈向东
摘要(Abstract)：
介绍一种基于TSMC 0.18μm工艺设计的锯齿波产生电路。传统锯齿波产生电路通常以比较器为核心结构,采用恒流源充放电技术实现。为了获得更快的响应速度,设计了一款利用内部正反馈原理实现的迟滞比较器来取代传统比较器,同时改进架构,得到一种对电源电压变化不敏感,具有较高频率的锯齿波产生电路。最终通过HSpice对电路进行了仿真验证,在常温下锯齿波的频率大约为7.5 MHz;同时当电源电压在2.5~4.5 V内变化时,锯齿波的频率变化不超过0.12 MHz。
关键词(KeyWords)： 锯齿波;迟滞比较器;正反馈;恒流源;快速响应;仿真验证
基金项目(Foundation): 国家自然科学基金面上项目(61471305);国家自然科学基金青年科学基金项目(61504111)~~
作者(Author): 魏荷坪,孙江,陈向东
DOI: 10.16652/j.issn.1004-373x.2018.04.018
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