EDN

Filter Circuit for Human Speech

The circuit has been designed to develop a speech filter that will improve the signal processing circuit for optimizing speech recognition. TL072 – a low noise JFET input operational amplifier with ...
EDN

Subwoofer Filter Circuit

This subwoofer active filter circuit is a 24 dB octave filter with a Bessel character and cutoff frequency of 200 Hz. So, if you are interested in experimenting with audio circuits in subwoofer range, ...
Electronic Design

Surge Filter Protects Single-Phase Circuits

Protecting single-phase power circuits is the job of a combination surge protector and EMI/RFI filter device. The Trabtech surge filter includes a coordinated TVSS and EMI/RFI filter circuit, ...
Electronic Design

Analog Filter and Linear Circuits Text Plus Kits

EIM Technologies' Kickstarter campaign ended on April 16, 2025, reaching ~$108,000 in pledges. The book and associated kits can now be ordered from EIM directly, with details below. EIM used ...