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.
For about a decade, Ultra-WideBand applications demonstrated its interest for radio and imaging applications in the [3.1–4.9 GHz] frequency band. In order to carry out such applications in other frequency domains, the instantaneous frequency of the impulse signal is commonly used. This paper describes the design of an Instantaneous Frequency Measurement system in order to show its feasibility for...
Modern autofocus systems are known for their fast response speed and optimized routines of the image processing. Nevertheless, the bottleneck of the autofocus system development is the transformation of the technical specification into the design rules that strictly take in account the specifications and introduce a guarantee of the best performance. In this paper we propose a new approach in autofocus...
A compact expression describing the transient behaviour of the Van der Pol oscillator is presented. An original simplification on the amplitude variation leads to a new expression of the oscillation phase transient behaviour. This new expression is particularly suitable for describing oscillator relaxation, i.e. when the oscillator switches from a forced to a free oscillation state. It is shown that...
The paper describes the possible use of a spintorque oscillator in the design of a radiofrequency macro-oscillator. The low consumption and the nanometric size of spintorque oscillators comparatively to LC circuits open new perspectives for these devices. Unfortunately a single spintorque oscillator cannot be used for radiofrequency applications due to a very low power and a high level of phase noise...
In this paper, the basic principle of the spintorque oscillator is presented. The output of the oscillator exhibits a very low power and an important level phase noise. In order to improve the output signal performance, a coupling approach is presented herein.
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.