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This work deals with the design and implementation of a 50 MHz Quartz Crystal Microbalance (QCM) Oscillator Electronic Circuit for its use as high sensibility DNA biosensor. The designed QCM oscillator sensor is able to detect the presence of complementary DNAs in a solution that match the sequence on a given strand in function of the changes in the output frequency of the oscillator. The design is...
This paper presents the design of a FPGA-based digital counter for the measurement of the oscillation frequency of Quartz Crystal Microbalance (QCM) sensors. This work is part of a bigger project focused on the development of a standalone QCM system for the analysis and characterization of organic coatings. The method used to implement the digital counter is the direct frequency measurement. Therefore,...
Up to now, the success of the design of quartz crystal-controlled oscillators (XCOs) based on high-stability classical configurations for uses as microgravimetric thickness-shear-mode acoustic-wave (TSM-AW) sensors in damping media has strongly depended on the ability and experience of the designer. The conditions of strong damping that quartz experiences imply the necessity to adapt the designs so...
A 6 MHz quartz crystal microbalance (QCM) sensor with a Miller oscillator is proposed for liquid media. It can solve the working in damping media problems of standard crystal controlled oscillators (XCO). The design is adapted to the conditions of strong damping that the quartz experiences, so that the oscillation stays in spite of the reduction of the resonator quality factor. The characteristic...
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