具有温度补偿的16MHz CMOS环形振荡器设计

发布时间：2018-05-24 06:16

  本文选题：环形振荡器 + 带隙基准源　； 参考：《半导体技术》2017年02期

【摘要】：设计了一种在一定温度内具有频率稳定性的高精度互补金属氧化物半导体(CMOS)环形振荡器。该电路利用带隙基准源为后续电路提供稳定电流,实现温度补偿。采用延时迟滞技术控制延时反相器充放电电流和反相器跳变电压,改善频率随电源电压变化的缺点,提高频率稳定性。基于0.5μm标准CMOS工艺,用Spectre软件进行仿真。结果表明,在电源电压为5 V,室温27℃时,该振荡器输出频率为16 MHz。温度为-35~125℃时,频率的最大偏移为±2.95%。当电源电压为4~5.5 V时,频率的最大偏移为2.04%~0.02%,满足DC/DC电路的设计要求。
[Abstract]:A high precision complementary metal oxide semiconductor (CMOS) ring oscillator with frequency stability at a certain temperature is designed. The circuit uses bandgap reference source to provide stable current for the subsequent circuit and realizes temperature compensation. The delay hysteresis technique is used to control the charge and discharge current of the delay inverter and the inverter jump voltage to improve the frequency variation with the supply voltage and to improve the frequency stability. Based on 0.5 渭 m standard CMOS process, Spectre software is used to simulate. The results show that the output frequency of the oscillator is 16 MHz when the supply voltage is 5 V and the room temperature is 27 鈩，

本文编号：1927997