17.7 A 1.89nW/0.15V self-charged XO for real-time clock generation

Author:

1 February 2014

conference paper
Published by Institute of Electrical and Electronics Engineers (IEEE)

No. 01936530,p. 298-299
DOI:10.1109/isscc.2014.6757442

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

OSCILLATORS
CLOCKS
POWER DEMAND
FREQUENCY MEASUREMENT
CRYSTALS
CAPACITORS
SOLID STATE CIRCUITS

This publication has 1 reference indexed in Scilit:

A microprocessor-based analog wristwatch chip with 3 seconds/year accuracy
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