Design of Dual Edge 0.5 Hz Precision Frequency Counter for QCM Sensor

Vani R. Wijayanto; Setyawan P. Sakti

doi:10.4028/www.scientific.net/AMM.771.29

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HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vol. 771Design of Dual Edge 0.5 Hz Precision Frequency...

Design of Dual Edge 0.5 Hz Precision Frequency Counter for QCM Sensor

Abstract:

Frequency counter is used widely in many electronic and sensor applications. In a resonance sensor system such as Quartz Crystal Microbalance or Surface Acoustic Wave, frequency counter is the main part of the measuring system. Precision, stability, accuracy and compactness of the frequency counter become a fundamental aspect of the development. In a sensor system, a frequency counter is needed to have a precision down to 1 Hz or even better with a sampling rate of one second. Increasing a precision of the counter from 1 Hz to 0.5Hz will result an improvement of the sensor output signal resolution. In this work we have designed a circuit system which is implemented in a single chip device to get a counting of the frequency down to 0.5Hz without suffering the sampling time. To implement such a required system, a CPLD is one of the best options to be used as a device for the frequency counter. In this paper a dual edge frequency counter using CPLD XC2C256 has been successfully developed. The system consists of 2 channels, 26 bits dual edge frequency counter. The system can count a frequency up to 67MHz, which is enough for the many QCM sensor system. By using a high stabile TCXO and calibrated again a rubidium oscillator, the developed system results in a high stability and accuracy. A precision of 0.5Hz with sampling rate of 1 second can be achieved by the developed system.

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Periodical:

Applied Mechanics and Materials (Volume 771)

Pages:

29-32

DOI:

https://doi.org/10.4028/www.scientific.net/AMM.771.29

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Online since:

July 2015

Authors:

Vani R. Wijayanto, Setyawan P. Sakti*

Keywords:

Dual Edge, Frequency Counter, QCM Sensor

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