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Suppression of overtone oscillation and low‐current operation using novel‐design scheme for quartz crystal oscillators
Author(s) -
Satoh Tomio,
Izyan Binti Ruslan Ruzaini,
Marumo Masahide,
Akitsu Tetsuya
Publication year - 2012
Publication title -
ieej transactions on electrical and electronic engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.254
H-Index - 30
eISSN - 1931-4981
pISSN - 1931-4973
DOI - 10.1002/tee.21699
Subject(s) - colpitts oscillator , overtone , crystal oscillator , vackář oscillator , oscillation (cell signaling) , pierce oscillator , voltage controlled oscillator , crystal (programming language) , electrical engineering , quartz , inverter , optoelectronics , materials science , electronic engineering , physics , engineering , computer science , voltage , resonator , chemistry , spectral line , biochemistry , astronomy , composite material , programming language
A novel design is proposed for a low‐frequency quartz crystal oscillator circuit. Negative resistance in a low‐frequency CMOS‐inverter quartz oscillator was reviewed for the fundamental mode at 32 kHz and the overtone oscillation at 200 kHz. Suppression of the overtone oscillation, appropriate gain, and drive current reduction are realized by adding only three circuit components. Experimental results and an estimate of the absolute value of the negative resistance are presented for the conventional Colpitts circuit and two types of the quartz crystal oscillator circuit. © 2011 Institute of Electrical Engineers of Japan. Published by John Wiley & Sons, Inc.