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Interference Technology

For EMI / EMC Engineers

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Shielding

FN9260 & FN9262 – IEC Inlet Filters With Wire Leads

 

Following a strong demand in the market - as an international leading company in the field of electromagnetic compatibility - we provide more connection options for the existing FN9260 and FN9262 filter series.  Exceptional conducted attenuation performance. Option with Stranded Wire Leads The option with stranded wire leads not only comes with a shorter housing … [Read more...]

ESD Testing Needs to Change to Reflect Real-Life

 

Semiconductor die shrinking means that 0.7ns risetimes are now too slow Electrostatic discharges in the real world cover a very wide range: from relatively slow high-voltage events (say, > 1kV peak) to extremely fast low-voltage events (say, < 1kV peak). The figure shown is of the transient field radiated by a micro-gap discharge between two coins – more on this … [Read more...]

Ground / Power Bounce Cause Noise Emissions From All IC Pins

 

Ground and power bounce are often ignored as sources of CM noise emitted from all integrated circuit (IC) pins, even if they are static inputs or outputs, digital or analogue, and even sometimes emitted as radiated noise directly from the body of the IC (especially when its physical structure resonates). CMOS ICs use ‘totem-pole’ logic switching gates that momentarily short … [Read more...]

Risks Associated with EMC and EMI – Don’t get Confused!

 

There are many kinds of risk For example: the risk of being late for an appointment; the risk of buying a lottery ticket but  not winning a prize; the risk of designing and manufacturing a new product that might not sell well enough, etc. The above are examples of non-safety-related risks, but safety-related risks also exist. EMC1 Risk Management (or, the Risk Management … [Read more...]

A Simple Method for Estimating Radiated Emissions – Part 2

 

I recently published this blog, detailing a simple proven method for estimating the radiated E field with  specified test setup. As a result, I received the following feedback... 'This model is wrong for equipment tested over a ground plane as described. The complex correct transmission line model (less the ground plane) is given by Balanis, and a simpler but accurate … [Read more...]

A Simple Method for Estimating Radiated Emissions

 

A simple method for estimating radiated emissions I recently received the following question: How to calculate the radiated E field with following test conditions with an antenna placed 1 meter away from the test setup?: A commercial equipment under test with metal housing  Equipment placed on the grounded metallic table/plane  LISN installed (and also placed … [Read more...]

Comparison of PWM VFDs versus Resonant Link Converters – Part 1

 

AC variable frequency drives (VFDs) have been in existence in a number of forms since the early 1970s. In the early 1980s the “pulse width modulated” (PMW) VFD versions began to appear. This form of motor control produced less motor rotor and stator harmonic heating and delivered smoother torque control at slow motor speeds. Thirty years on PWM VFDs are still the most … [Read more...]

Insertion Loss and Filter Performance

 

Background  Filters are almost always a part of electronics design. Design engineers design a filter to achieve certain attenuation in specified frequency range. There are many types of filters, such as high pass, low pass or bandwidth. Popular filter configurations include L-C, C-L-C (π) or L-C- L (T). It is safe to say that when it comes to filter design, the discussion of … [Read more...]

Heilind Electronics Partners with Quell Corporation, Expanding EMI/RFI Filtering Portfolio

 

Heilind Electronics, a premier global distributor of electronic components, has expanded its connector portfolio with the addition of Quell Corporation – a subsidiary of HEICO and a leading manufacturer of EMI/RFI and transient protection solutions. The distribution agreement includes both Heilind Electronics and Interstate Connecting Components (ICC), the mil-aero division of … [Read more...]

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