TITLE:
Start-Up Acceleration of Quartz Crystal Oscillator Using Active Inductance Double Resonance and Embedded Triggering Circuit
AUTHORS:
Tomio Sato, Akira Kudo, Tetsuya Akitsu
KEYWORDS:
Double Resonance Quartz Crystal Oscillator, Active Inductance
JOURNAL NAME:
Journal of Sensor Technology,
Vol.5 No.1,
February
26,
2015
ABSTRACT: Low-frequency double-resonance quartz crystal oscillator was developed with active inductance circuit aiming the start-up of stable oscillation of tuning fork-type quartz crystal resonator at 32.768 kHz within 0.37 ms. The initial oscillation is triggered by a part of crystal oscillator forming a CR oscillator. The negative resistance ranges to 4 MΩ at gmf of 4.1 μA/V. In a limited frequency range, the circuit shows negative reactance Ccci = -3.4 pF equivalent to inductance Lcc = 9.8 H. The Allan standard deviation indicated 10-11 to 10-10, showing high stability comparable to general quartz crystal oscillator.