一种应用于唤醒电路的高精度RC振荡器  

A High Precision RC Oscillator Used for Wake-Up Circuit

作　　者：朱明旺 李天望 ZHU Mingwang;LI Tianwang(Xiangtan University,Xiangtan 411105,China;Goke Microelectronics Co.Ltd.,Changsha 410100,China)

机构地区：[1]湘潭大学,湖南湘潭411105 [2]湖南国科微电子股份有限公司,长沙410100

出　　处：《电子与封装》2018年第8期23-27,共5页Electronics & Packaging

摘　　要：设计了一种应用于唤醒电路、能够完全集成的33.7 k Hz RC振荡器。该振荡器采用了由NMOS电压跟随器和一个由PTAT基准电流源提供偏置的快速翻转复制反相器构成的局部电压调整电路。该技术能够降低振荡器核心电路的功耗,降低核心电路对电源电压变化的灵敏度。振荡器基于NEX chip 0.15μm CMOS工艺进行设计,在-40~80℃的温度范围内最大相对频率变化约为0.353%,在-40~40℃的温度范围内相对频率变化约为±0.62‰,能够适应国内各地区的应用环境。An on-chip RC oscillator with 33.7 kHz frequency was designed for wake-up circuit.The oscillator uses a local voltage regulator,consisting of an NMOS voltage follower and a replica inverter that is flipped and biased by a PTAT reference current.This can reduce the power of oscillator's core circuit and sensitivity to the change of supply voltage.The oscillator is designed based on NEX chip 0.15滋m CMOS process,in the temperature range of-40 to 80℃,the maximumrelative frequency variation is 0.353%,in the range of-40 to 40℃,the relative frequency variation is about±0.62‰,which canmeet the demand of various region in China.

关 键 词：唤醒电路 PTAT基准电流源 局部电压调整电路 RC振荡器 

分 类 号：TN402[电子电信—微电子学与固体电子学]