2020-04-17 - John Dunn

Making measurements with your mind’s eye

There are always going to be situations where the only real measurement tool you have available is your own mind's…

2020-04-13 - John Dunn

Reverse engineering an electrical spark igniter

When the electrical spark igniter in the kitchen stove stopped working, this engineer dug in to see how it was…

2020-04-03 - Merlin Blencowe

Variable gain superbal circuit preserves CMRR

This adaptation of a superbal circuit allows for adjustable gain without CMRR degradation.

2020-03-26 - John Dunn

Protecting antennas

The method used to protect antenna installations from humans is similar to protecting bird houses from squirrels.

2020-03-24 - Kendall Castor-Perry

Five things you should know about RMS

The problem is that for any unknown signal, the RMS 'value' can only be defined if you give a start…

2020-03-11 - Lee Goldberg

Re-thinking acoustic wave filters

Could this new approach to monolithic RF filters help pave the way to practical tri-band 5G handsets?

2020-03-10 - John Dunn

Zero offset active lowpass filter, part 4

Circuit suggestions should be rigorously analyzed to avoid adverse consequences.

2020-03-06 - Federico Coppede

Temperature drift compensation for audio power amplifiers

Compensate the DC voltage drift in the output of a directly-coupled power AB-Class audio amplifier to improve bass response.

2020-02-19 - Bill Schweber

Some Progress in the Ongoing Multiband Antenna Proliferation Battle

Multiband, co-located RF installations are placing increasing demands on antennas and RF front ends. There are solutions, but they are…

2020-02-13 - John Dunn

The operating principle of a buzzer

The buzzer is a very old technology with some significant virtues.