Vicor Applications Engineers
Solve Problems Face to Face and in Video
Electromagnetic noise is pervasive. It is the result of electric currents, magnetic fields, and electromagnetic fields. Practically, that means noise is created by such natural phenomena as lightning and solar flares, and manmade electrical or electronic devices like radio transmitters and switching power supplies. In the context of power system design, noise ― commonly referred to as electromagnetic interference (EMI) or radio frequency interference (RFI) ― appears as unwanted currents. These unwanted currents degrade the performance of any susceptible device. Electromagnetic Compatibility (EMC) is the ability of the source and the receptor to operate in a given electromagnetic environment.
One of Vicor customers is a design house mainly for MIL ground and flight applications, which includes products that suppress or eliminate radio frequency noise and electromagnetic interference. In addition to using Vicor products (all five of their current platforms use Vicor products), a long-time working relationship exists between their designers and Vicor application engineers.
In a recent encounter, involving a design in which they wanted to implement Inmate sockets, the designer mentioned a requirement for extremely low output ripple and asked about using some discrete components (LC) at the output to reduce the ripple. The apps engineer showed him a sample of a Picor QPO output ripple attenuator and told him that it was an active filter specifically designed to reduce power supply output ripple and periodic and random deviation (PARD) noise over 30 dB from 1 kHz to 500 kHz. He immediately ordered a QPO evaluation board. The designer also mentioned watching the video on output ripple reduction and that he was very pleased with the information presented.
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