April 3, 2020 - Merlin Blencowe

Variable gain superbal circuit preserves CMRR

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

March 26, 2020 - John Dunn

Protecting antennas

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

March 24, 2020 - 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…

March 11, 2020 - 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?

March 10, 2020 - John Dunn

Zero offset active lowpass filter, part 4

Circuit suggestions should be rigorously analyzed to avoid adverse consequences.

March 6, 2020 - 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.

February 19, 2020 - 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…

February 13, 2020 - John Dunn

The operating principle of a buzzer

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

February 11, 2020 - Kendall Castor-Perry

Sample multiple channels ‘simultaneously’ with a single ADC

You can sample a number of analog input channels sequentially with a single ADC in such a way that the…

January 31, 2020 - Vijay Deshpande

Solar day lamp designs use passive and active current-limiting circuits

This Design Idea provides complete instructions for designing solar day lamps using both passive and active current limiting circuits.