Soft errors as well as damage can be caused by ESD in electronic systems. Such effects have resulted in many problems with companies and customers incurring large costs. Effects on system immunity from printed wiring board layout will be covered and examples of field problems described. Suggestions on how to avoid such problems are given.

The interaction effects between electromagnetic fields and biological tissues depend on the frequency range of the exposure fields. The measurement of low-frequency magnetic fields with regard to human exposure typically requires two field meters, one working in the frequency bandwidth from 20 Hz to 2 kHz and the other working from 2 kHz to a few hundred kHz. This is why the authors propose a tri-axis measurement system which covers alone the wide frequency range from 40 Hz to 150 kHz. It can be used for both spot measurements and long term monitoring of the magnetic field especially inside the residential buildings.

Actually, quasidigital sensors are become very important in noisy environments. In order to learn how quasidigital sensor works, the target of this paper is to design a data acquisition system based on a computer and a PCI (NI Pci-6221) data acquisition board to acquire data from SMT160 quasidigital temperature sensor using the ELVIS platform and Labview as a language programming software. In addition the Universal Transducer Interface from Smartec will be evaluated as an analog to frequency converter for resistive and capacitive sensors. The objective of this present paper is to study and to realize a practical application that can be called a revolution in the sensor application because it doesn’t need any additional elements or any signal acquisition: UTI (Universal Transducer Interface).

This paper is focused on how to implement a nonlinear voltage divider used in the electrical power network disturbances measurement system preconditioning circuit. The voltages acquired from the electrical power network have amplitudes between 0.2 kV and 10 kV, values which are very high for an acquisition board. These amplitudes must be reduced to the values accepted by the acquisition boards: ±10V. If the signal from the electrical power network is divided with a linear voltage divider, the smaller variations around the nominal values of the voltage on the electrical power network can not be detected. This is the reason to prefer the use of a nonlinear voltage divider.

Sugestive for this paper is the students’ expression that says „the first 6 years are difficult until you reach the third school year”. And the rhymes are not very far from the truth. In this moment the curriculum sets for the first two years only fundamental courses as: math, physics, mechanics, electronics, computer programming. In the last two or three years there are special courses, that are meant to transform the good theoretical base student into an inventive and skilful engineer. The partition of the education process in two separate successive stages: base preparation and technical education seams fair, theoretically speaking. Unfortunately our experience has shown that things aren’t going the right way because the lack of a professional horizon. Theoretical base preparation, time and energy consumer, barely allows the student to dream of technical accomplishments and to fulfill their hopes. Students carry on the first stage of preparation without foreseeing the MP3 encoder in the study of Fast Fourier Transform, a dancing robot control in the study of differential equations or an environment parameters monitoring system in thermodynamics. More than that, an important percent of the students is losing the enthusiasm and sometimes the belief that they will achieve what they have hoped.