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Vol. 166, Issue 3, March 2014, pp. 145-150




Susceptibility of the Crystal Oscillator to Sinusoidal Signals over Wide Radio Frequency Range

Tao SU, Hanyu ZHENG, Dihu CHEN, Min CHEN

School of Physics and Engineering, Sun Yat-sen University, Guangzhou, 510275, China
Tel.: +86-2084114462, fax: +86-2084113048

E-mail: sutao@mail.sysu.edu.cn



Received: 20 December 2013 /Accepted: 28 February 2014 /Published: 31 March 2014

Digital Sensors and Sensor Sysstems


Abstract: Oscillators are sensitive to radio frequency interference. Therefore they can be applied to measure radio frequency interference. Radio frequency interference sources cover wide frequency ranges. It is interesting to see the frequency dependence of the oscillator susceptibility to radio frequency interference. This paper uses the crystal oscillator as the device under test and performs a systematic simulation on susceptibility. The transistor-level simulation shows that the oscillator susceptibility varies strongly with the signal frequency. The behavior of the oscillator susceptibility could be characterized with critical features and explained with three response modes. Both the simulated behavior and the proposed response mechanism are confirmed with the measurement results. The conclusion of the paper helps to calibrate oscillator sensors. It is also an important guideline for building analysis model in the design phase of the sensor.


Keywords: Frequency response, Interference, Susceptibility, Sensor, Oscillator.


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