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.
This circuit is from the 2005 Linear Technology Application Manual. The circuit must be powered by 5...
Originally recommended to give a tone of transmission in equipment of the 60s (tubed) this circuit is...
September 2017 - Texas Instruments TPS543C20 Step-Down Converters can be found on Mouser...