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0.35μm 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 k Hz,由于温度和电源电压变异,频率变化范围为47.54~53.97 k Hz,最大功耗电流为2.1μA,面积为150μm×180μm,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。
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 × 180μ m. It has low power consumption and provides a relatively stable frequency. The oscillator is applicable for power management ICs.
出处
《电子科技》
2015年第5期68-70,共3页
Electronic Science and Technology
关键词
RC振荡器
低功耗
电容修调
误差
RC oscillator
low power consumption
capacitor trimming
error
