[1] [1] TSAI Y K, LU L H. A 51.3-MHz 21.8-ppm/℃CMOS relaxation oscillator with temperature compensation[J]. IEEE Transactions on Circuits and Systems II: Express Briefs, 2017, 64(5): 490-494.

[2] [2] TRUESDELL D S, LI S, CALHOUN B H. A 0.5-V 560-kHz 18.8-fJ/cycle on-chip oscillator with 96.1-ppm/℃ steady-state stability using a duty-cycled digital frequency-locked loop[J]. IEEE Journal of Solid-State Circuits, 2021, 56(4): 1241-1253.

[3] [3] TOKUNAGA Y, SAKIYAMA S, MATSUMOTO A, et al. An on-chip CMOS relaxation oscillator with voltage averaging feedback[J]. IEEE Journal of Solid-State Circuits, 2010, 45(6): 1150-1158.

[4] [4] TOKAIRIN T, NOSE K, TAKEDA K, et al. A 280nW, 100kHz, 1-cycle start-up time, on-chip CMOS relaxation oscillator employing a feedforward period control scheme[C]//2012 Symposium on VLSI Circuits. Honolulu, HI, USA. 2012: 16-17.

[5] [5] CHANG Y A, ADIONO T, HAMIDAH A, et al. An on-chip relaxation oscillator with comparator delay compensation[J]. IEEE Transactions on Very Large Scale Integration (VLSI) Systems, 2019, 27(4): 969-973.

[6] [6] ZHENG J W, CHENG L, JIANG J M, et al. Relaxation oscillator with dynamic comparator and slope-boosting technique[J]. IEEE Transactions on Circuits and Systems II: Express Briefs, 2018, 65(10): 1330-1334.

[7] [7] PAIDIMARRI A, GRIFFITH D, WANG A, et al. An RC oscillator with comparator offset cancellation[J]. IEEE Journal of Solid-State Circuits, 2016, 51(8): 1866-1877.

[8] [8] HAN Y, QIAN Y J, SUN J, et al. A self-calibration technique for on-chip precise clock generator[J]. IEEE Transactions on Circuits and Systems II: Express Briefs, 2015, 62(12): 1114-1118.

[10] [10] AN X M, PAN S N, JIANG H, et al. A 0.01 mm2 10MHz RC frequency reference with a 1-point on-chip-trimmed inaccuracy of ±0.28% from −45℃ to 125℃in 0.18m CMOS[C]//2023 IEEE International Solid-State Circuits Conference. San Francisco, CA, USA. 2023: 60-62.

[11] [11] HAN J, CHOI W J, SON Y S, et al. ASIL-D and AEC-Q100 grade 0 compliant automotive RC oscillator with farey sequence-based calibration[C]//2024 IEEE Custom Integrated Circuits Conference. Denver, CO, USA. 2024: 1-2.