Listen to the pop, sizzle, and hum. Look at the bars and wavy lines. These and other characteristics of electromagnetic interference (EMI) are very familiar. RF energy is radiated from a culprit ...

Air Force Research Laboratory scientists recently patented a new tunable radio frequency (RF) filter design. The new design is for a smaller, lighter, less expensive device that requires much less ...

A scheme of simple band-pass RC- and LR- filters on operational amplifiers containing only one capacitor or inductor and 3 resistors is proposed. A comparison is made of the amplitude-frequency ...

The circuit was designed to create ten different frequency bands to be handled by a single graphic equalizer to produce and maintain a predetermined area of frequencies. Graphic Equalizer – a common ...

If you are in any way connected with radio, you will have encountered the low pass filter as a means to remove unwanted harmonics from the output of your transmitters. It’s a network of capacitors and ...

Download Volume 3 of the Bob Pease eBook series. This morning, some darned kid engineer (rather bright for a 15-year-old!) asked me if I could show him anywhere he could add a little narrow-band boost ...

Researchers at the University of Twente, The Netherlands, have developed a programmable integrated microwave photonic filter with what they describe as “a record-breaking dynamic range”. This ...