The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
The high stability crystal oscillator has been playing the heart of modern electronic communication equipment for decades, because of its excellent performance and reasonable price. It has three most significant indexes, namely, the aging, the phase noise and the frequency temperature stability. We found that when investigating the frequency temperature stability of high stability quartz crystal oscillator,...
A novel design of voltage controlled temperature compensated crystal oscillator (VCTCXO) is presented. This design will consider the current temperature compensation and the voltage-controlled voltage of regulation of the central frequency as a whole. A variable capacitance diode is adopted to fit the function of two variables, which avoids the problem that the temperature of the crystal oscillator...
In this paper, a novel mass-sensitivity-based method for field measurement of liquid viscosities using a quartz crystal microbalance (QCM) is presented. And a model which yields a quantitative description of the influence of the liquid properties on the oscillation frequency is established as well. The viscosity of liquids (which loaded on a QCM's center) could be quickly and conveniently obtained...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.