Ever tried to measure low-level signals in the presence of noise? Or wanted to capture a measurement isolated from ground, like that of an ungrounded hand-held digital multi-meter, but also needed to capture finer details of the signal, like those captured with an oscilloscope?
This article describes how the principles of laboratory testing of electrical noise impairment can be followed in the automotive sector to dramatically reduce the manufacturer’s development time and effort.
The International Electrotechnical Commission (IEC) has published a new edition of IEC 60195:2016, the standard for "method of measurement of current noise generated in fixed resistors."
That’s the conclusion of the authors of a recent article posted to the IEEE’s Spectrum website. “Radio-frequency noise pollution is everywhere,” note the article’s authors, Mark McHenry, Dennis Roberson and ... Read More...
Giga-tronics has released an application guide that discusses noise considerations in broadband microwave amplifiers. RF/microwave power amplifiers used in test and measurement applications are typically charac... Read More...
Electromagnetic interference (EMI) filters are often used on automotive 13.8 VDC power networks to reduce high-frequency noise from being conducted off the printed circuit boards (PCB) and resulting into EMI problems. The filter performance is difficult to predict and often compromised at high frequencies due to parasitics associated with the filter itself, or the PCB layout. The power line filters with Surface Mount Technology ferrite and Multi Layer Ceramic Capacitors are attractive solutions for mitigation of RF noise in high-density automotive PCBs. A lumped-element SPICE model is introduced for optimized π-filter design, including frequency-dependent ferrite component model. The PCB implementation of EMI filter is outlined for optimum filter performance.
All Ferrite Beads Are Not Created Equal – Understanding the Importance of Ferrite Bead Material Behavior
A ferrite bead is a passive device that removes noise energy from a circuit in the form of heat. The bead creates impedance over a broad frequency range that eliminates all or part of the undesired noise energy over that frequency range.