一种与比较器延迟无关的高精度CMOS振荡器  

A High Precision CMOS Oscillator with Independence of Comparator Delay

作　　者：秦松 王磊 

机构地区：[1]帝奥微电子有限公司研发部,上海201103

出　　处：《电子科技》2017年第5期94-97,共4页Electronic Science and Technology

摘　　要：提出了一种采用0.18μm CMOS工艺制作的浮动初始电压(FIV)型高精度振荡器电路。浮动初始电压(FIV)技术用以消除比较器延迟对振荡器频率的影响,同时利用器件的匹配特性使得振荡频率仅和RC相关。此外通过适当的温度系数补偿,此振荡器可以在-40~125℃达到+0.5%的精度,并且仅占0.035 mm2的芯片面积。A high - precision oscillator with Floating Initial Voltage （FIV） technology based on 0. 18 μm CMOS process is proposed. The accuracy of the oscillator is analyzed and it is shown that the oscillator frequency is independent of comparator delay by utilizing Floating Initial Voltage （FIV）. The oscillation frequency is only related to the value of R and C with proper device matching. Silicon result shows the oscillator achieves frequency variation of less than ＋ 0.5% against the temperature variation of -40 -125 ℃ with proper trimming and temperature compen- sation at an area of only 0. 035 mm2.

关 键 词：浮动初始电压 RC振荡器 CMOS 比较器延迟 

分 类 号：TN432[电子电信—微电子学与固体电子学]