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 traditional direct amplification MW radio configuration was obtained in an American...
This filter, which rejects frequencies around 1 kHz, was found in the August 1993 Electronics Now...
The CMOS 4046 integrated circuit is not very common today, consisting of a very efficient PLL for...