Energy‐efficient leakage‐based oscillator with stacked structure for nW harvesters. Issue 1 (1st January 2019)

• Record Type: Journal Article
• Authors: Jang, E.; Lee, H.; Lee, Y.
• Is Part Of: Electronics letters. Volume 55:Issue 1(2019)
• Page Start: 45
• Page End: 47
• Publication Date: 2019-01-01
• Subjects: oscillators -- low‐power electronics -- power consumption -- energy harvesting -- VHF oscillators -- radiofrequency integrated circuits -- energy conservation -- short‐circuit currents; energy‐efficient leakage‐based oscillator -- nW harvesters -- ultra‐low‐power oscillator -- nanowatt‐level energy harvesters -- cycle costs -- leakage‐based delay cell -- dynamic power consumption -- short‐circuit current minimization -- capacitively coupled stacked structure -- CMOS process -- frequency 18.2 kHz to 226.0 kHz -- size 180.0 nm -- voltage 2.2 V; Electronics -- Periodicals; 621.381
• DOI: 10.1049/el.2018.6784
• Languages: English
• ISSNs: 0013-5194

Abstract

Abstract : An ultra‐low‐power oscillator with 0.24 pJ/cycle energy efficiency is presented, suitable for nanowatt‐level energy harvesters. The sub‐pJ/cycle energy efficiency is comparable with the lowest energy per cycle costs of prior arts and is achieved by minimising short‐circuit current with a leakage‐based delay cell and minimising dynamic power consumption with a capacitively coupled stacked structure. The proposed oscillator is fabricated in 180 nm CMOS process. Under 2.2 V supply voltage, the energy per cycle is 0.24 pJ/cycle over a frequency range of 18.2–226 kHz.