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A 25 ppm C 105-MHz Relaxation Oscillator With Dynamic Frequency-Error Compensati
一款105MHz弛豫振荡器，采用动态频率误差补偿技术，温度系数低至2.5 ppm/°C。
1.05MHz, 2.5ppm/°C TC, 160ps RMS抖动, 69µW@1V
弛豫振荡器温度补偿PTAT电流基准数字频率补偿低功耗
▸采用PTAT电流基准和TC可调电阻库进行一阶频率误差补偿
▸使用单比特温度传感器的数字频率补偿(DFC)块进行二阶补偿
▸采用电压缓冲器实现8µs快速启动
Abstract
This paper presents a 1.05 MHz, on-chip RC
relaxation oscillator (ROSC) wit h a temperature coefficient (TC)
of 2.5 ppm/ ◦C and an absolute variation of 100 ppm over
the body-compatible range of 0–40 ◦C. The TC increases to
4.3 ppm/ ◦C over the range from −15 ◦Ct o5 5 ◦C. The high
temperature stability is achieved using a PTAT current reference
and a TC-tunable resistor bank for first-order frequency error
compensation along with a digital frequency compensation (DFC)
block using a single-bit temp