摘要
A resistive frequency-locked loop on-chip oscillator based on a double chopper stabilization technique is proposed for the improvement of frequency stability. The temperature-sensitive nonidealities, including the reference mismatch current and amplifier offset voltage, are suppressed by a double chopper stabilization technique. A prototype chip is implemented in a 180-nm CMOS process with an active area of 0.3 mm2. The measurement results show that the frequency-locked oscillator operating at 250 kHz achieves temperature stability of 27.1 ppm/°C and long-term stability of 2.73 ppm, with the power consumption of 293 nW. The mitigation of the low-frequency flicker noise results in a 16X improvement in the long-term stability of the RFLO compared to that with no chopper technique.
原文 | English |
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頁(從 - 到) | 655-666 |
頁數 | 12 |
期刊 | IEEE Transactions on Circuits and Systems I: Regular Papers |
卷 | 70 |
發行號 | 2 |
DOIs | |
出版狀態 | Published - 2023 2月 1 |
All Science Journal Classification (ASJC) codes
- 硬體和架構
- 電氣與電子工程