Fundamentals of analog filter design and linear circuits are covered in a book and kit of parts that are available on EIM Tech's site after a successful ~$108,000 Kickstarter campaign.

SKiDL is very, very cool. It’s a bit of Python code that outputs a circuit netlist for KiCAD. Why is this cool? If you design a PCB in KiCAD, you go through three steps: draw the schematic, a… ...

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, ...

Figure 5 This is the filter board from the Würth Elektronik filter kit with components added to suppress conducted emissions in the range 10 kHz to 30 MHz. The published insertion loss curves from ...

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 ...