There’s a joke in the world of radio that all you need for a HF antenna is a piece of wet string, but the truth is that rudimentary antennas rarely perform well. Random pieces of wire may pul… ...

Of course, a “simple” open-loop control system can mean a steeper learning curve. It’s not easy to learn to drive a manual transmission. But if you don’t know how to drive one, ...

Using a reconfigured common-mode choke as an isolation transformer to analyze the open-loop response of a Peltz oscillator.

A signal-injection circuit for control-loop analysis is flat from dc to 200 kHz, isolated from chassis ground and easily constructed with a readily available instrumentation amplifier Brian Keeney ...

Simple construction allows an open-loop Hall effect sensor to beat its closed-loop counterparts in terms of price, weight, and size; yet it may be susceptible to temperature variation and ...