This high-Q low-pass filter was found in the October 1990 issue of Radio Electronics magazine. The frequency depends on the capacitors used and is on the order of a few tens of hertz.
Suggested by Harris in documentation from the 80s, this circuit uses components from that time. It...
We found this circuit in a Radio Electronics. The circuit can be seen elsewhere on this site. The...
This circuit allows you to view two low frequency signals on a single channel oscilloscope. It was...