[1] [1] ERDEM H E, GUNGOR V C. On the lifetime analysis of energy harvesting sensor nodes in smart grid environments ［J］. Ad Hoc Networks, 2018, 75: 98-105.

[2] [2] LIU H, FU H, SUN L, et al. Hybrid energy harvesting technology: from materials, structural design, system integration to applications ［J］. Renewable and Sustainable Energy Reviews, 2021, 137: 110473.

[3] [3] SHAIKH F K, ZEADALLY S. Energy harvesting in wireless sensor networks: a comprehensive review ［J］. Renewable and Sustainable Energy Reviews, 2016, 55: 1041-1054.

[4] [4] SANISLAV T, MOIS G D, ZEADALLY S, et al. Energy harvesting techniques for internet of things (IoT) ［J］. IEEE Access, 2021, 9: 39530-39549.

[5] [5] AMIN S S, MERCIER P P. MISIMO: a multi-input single-inductor multi-output energy harvesting platform in 28-nm FDSOI for powering net-zero-energy systems ［J］. IEEE Journal of Solid-State Circuits, 2018, 53(12): 3407-3419.

[6] [6] KIM H, MAENG J, PARK I, et al. A 902% peak efficiency multi-input single-inductor multi-output energy harvesting interface with double-conversion rejection technique and buck-based dual-conversion mode ［J］. IEEE Journal of Solid-State Circuits, 2020, 56(3): 961-971.

[7] [7] YU G, CHEW K W R, SUN Z C, et al. A 400 nW single-inductor dual-input-tri-output DC-DC buck-boost converter with maximum power point tracking for indoor photovoltaic energy harvesting ［J］. IEEE Journal of Solid-State Circuits, 2015, 50(11): 2758-2772.

[8] [8] JUNG J H, JUNG Y H, HONG S K, et al. A high peak output power and high power conversion efficiency SIMIMO converter using optimal on-time control and hybrid zero current switching for energy harvesting systems in IoT applications ［J］. IEEE Transactions on Power Electronics, 2020, 35(8): 8261-8275.

[9] [9] KINGER B, SUMAN S, SHARMA K G, et al. Design of improved performance voltage controlled ring oscillator ［C］ // 2015 Fifth International Conference on Advanced Computing & Communication Technologies. 2015: 441-445.

[10] [10] LIU C W, LEE H H, LIAO P C, et al. Dual-source energy-harvesting interface with cycle-by-cycle source tracking and adaptive peak-inductor-current control ［J］. IEEE Journal of Solid-State Circuits, 2018, 53(10): 2741-2750.

[11] [11] SHARMA S K, GAMAD R S, BANSOD P P. Design and analysis of low power, high speed, leakage control comparator using 180 nm technology for A/D converters ［C］ // 2021 IEEE Madras Section Conference (MASCON). 2021: 1-5.