一种应用于唤醒电路的高精度RC振荡器

doi:10.16257/j.cnki.1681-1070.2018.0087

电子与封装 ›› 2018, Vol. 18 ›› Issue (8): 23 -27. doi: 10.16257/j.cnki.1681-1070.2018.0087

一种应用于唤醒电路的高精度RC振荡器

朱明旺¹，李天望^1，2

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

出版日期:2018-08-20 发布日期:2018-08-20
作者简介:朱明旺（1993—），男，山东金乡人，湘潭大学物理与光电工程学院硕士研究生，主要从事低压低功耗集成电路研究与设计；李天望（1968—），男，湖南常德人，博士学历，高级工程师，毕业于复旦大学半导体物理与器件物理专业，2001年3月至2002年2月在香港科技大学从事博士后研究，2015年8月就职于国科微电子，现任中央研究院副院长，湘潭大学硕士研究生导师，主要从事大规模模拟集成电路的研究与设计。

A High Precision RC Oscillator Used for Wake-up Circuit

ZHU Mingwang¹, LI Tianwang^1,2

1. Xiangtan University, Xiangtan 411105, China; 2. Goke Microelectronics Co. Ltd., Changsha 410100, China

Online:2018-08-20 Published:2018-08-20

摘要/Abstract

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。

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

Abstract: 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 0.15μm CMOS process, in the temperature range of -40 to 80℃, the maximum relative frequency variation is 0.353%, in the range of -40 to 40℃, the relative frequency variation is about ±0.62‰，which can meet the demand of various region in China.

Key words: wake-up circuit, PTAT reference current, local voltage regulated circuit, RC oscillator

中图分类号:

TN752

朱明旺，李天望. 一种应用于唤醒电路的高精度RC振荡器[J]. 电子与封装, 2018, 18(8): 23 -27.

ZHU Mingwang, LI Tianwang. A High Precision RC Oscillator Used for Wake-up Circuit[J]. Electronics & Packaging, 2018, 18(8): 23 -27.

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中国半导体行业协会封装分会会刊

中国电子学会电子制造与封装技术分会会刊

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

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