›› 2015, Vol. 28 ›› Issue (5): 68-.

• 论文 • 上一篇    下一篇

一种新型电容修调RC振荡器

王文龙,洪树亮   

  1. (兰州交通大学 电子与信息工程学院,甘肃 兰州 730070)
  • 出版日期:2015-05-15 发布日期:2015-05-19
  • 作者简介:王文龙(1988—),男,硕士研究生。研究方向:模拟集成电路设计。Email:w_wenlong@126.com

A Novel Capacitor Trimming RC Oscillator

WANG Wenlong,HONG Shuliang   

  1. (School of Electronic and Information Engineering,Lanzhou Jiaotong University,Lanzhou 730070,China)
  • Online:2015-05-15 Published:2015-05-19

摘要:

为了降低RC振荡器的功耗,并提高振荡频率的稳定性,提出一种新型的RC振荡器电路。该振荡器采用单比较器,结合电容修调结构。基于0.35 μm BCD工艺及Hspice 仿真工具,完成了电路的设计和仿真,仿真结果表明,该振荡器正常工作频率为51 kHz,由于温度和电源电压变异,频率变化范围为47.54~53.97 kHz,最大功耗电流为2.1 μA,面积为150 μm×180 μm,具有较低的功耗,可以提供相对稳定的频率,能够应用于电源管理芯片。

关键词: RC振荡器, 低功耗, 电容修调, 误差

Abstract:

In order to reduce power consumption and improve stability of frequency for RC oscillator,a novel RC oscillator is proposed.It uses a single comparator and trimming capacitor structure.An accurate design and simulation were made based on 0.35 μm BCD process and Hspice.The simulation results show that the normal frequency is 51 kHz.Because of temperature and supply voltage variations,the frequency can change from 47.54 kHz to 53.97 kHz.It consumes 2.1 μA.The final die size is 150 μm×180μm.It has low power consumption and provides a relatively stable frequency.The oscillator is applicable for power management ICs.

Key words: RC oscillator;low power consumption;capacitor trimming;error

中图分类号: 

  • TN752