Ultra-low-power one-pin crystal oscillator with self-charged technique

• Published in: Electronics letters Vol. 52; no. 4; pp. 325 - 327
• Main Authors: Wu, Shang-Chi, Lee, Tai-Cheng
• Format: Journal Article
• Language: English
• Published: The Institution of Engineering and Technology 18.02.2016
• Subjects: Architecture; Circuits; CMOS; CMOS integrated circuits; CMOS technology; complementary metal oxide semiconductor; constant‐current op amp; Consumption; Crystal oscillators; Crystals; Electronics; frequency 32.768 kHz; low‐power electronics; one‐pin XO; power 2.89 nW; Power consumption; power consumption reduction; self‐charged architecture; self‐charged circuit; size 0.18 mum; ultralow‐power one‐pin crystal oscillator; voltage 0.25 V; Wireless communications; crystal oscillators; ultralow-power one-pin crystal oscillator; power consumption; one-pin XO; complementary metal oxide semiconductor; self-charged circuit; self-charged architecture; power consumption reduction; power 2.89 nW; frequency 32.768 kHz; CMOS technology; voltage 0.25 V; CMOS integrated circuits; constant-current op amp; low-power electronics; size 0.18 mum
• ISSN: 0013-5194; 1350-911X; 1350-911X
• DOI: 10.1049/el.2015.1703

A one-pin crystal oscillator (XO) employing a one-pin startup and self-charged architecture is proposed to reduce power consumption. The self-charged circuit, replacing a constant-current opamp, recharges crystal to save significant power. The proposed 32.768 kHz one-pin XO, fabricated in a 0.18 μm CMOS technology, consumes 2.89 nW from a 0.25 V supply.