一种带温度和工艺补偿的片上时钟振荡器

A Temperature Compensation and Process Calibration On-Chip CMOS Clock Oscillator

基于SMIC0.18μm1P6M的标准CMOS工艺,设计并实现了一种带温度补偿和工艺偏差校准的60MHz片上CMOS时钟振荡器.经仿真和流片测试验证,该结构的时钟振荡器输出频率能很好的稳定在60-61MHz,温度从-25℃变化至75℃时,频率仅变化108.5kHz,在对时钟精度要求不高的应用下,完全可以取代片外的石英晶振,降低成本.

This paper reports on the design and realization of a temperature compensation and process calibration 60MHz on-chip CMOS clock oscillator in SMIC 0.18um 1P6M CMOS process. According to the simulation and tapeout test results, the output frequency of this oscillator is stable between 60MHz and 61MHz, and the frequency only changes 108.5kHz when the temperature changes from - 25℃ to 75℃. This oscillator can be used in some low cost applications to replace the quartz crystal oscillator.