Title :
17.7 A 1.89nW/0.15V self-charged XO for real-time clock generation
Author_Institution :
MediaTek, Hsinchu, Taiwan
Abstract :
A 32.768kHz crystal (XTAL) with its oscillation circuit is widely adopted for the generation of the real-time keeping and system-standby clock. Both functions are universally demanded by various systems such as cellular phones, smart wearable devices, GPS, etc. High frequency stability against environmental variations is necessary to meet system requirements. To increase the system stand-by time under limited battery capacity, an ultra-low power crystal oscillator (XO) is strongly demanded.
Keywords :
clocks; crystal oscillators; low-power electronics; frequency stability; oscillation circuit; power 1.89 nW; real time clock generation; self-charged XO; ultralow power crystal oscillator; voltage 0.15 V; Capacitors; Clocks; Crystals; Frequency measurement; Oscillators; Power demand; Solid state circuits;
Conference_Titel :
Solid-State Circuits Conference Digest of Technical Papers (ISSCC), 2014 IEEE International
Conference_Location :
San Francisco, CA
Print_ISBN :
978-1-4799-0918-6
DOI :
10.1109/ISSCC.2014.6757442
