This circuit for frequencies up to a few tens of megahertz was found in the April 1978 issue of Radio Electronics magazine. The power supply must be symmetrical.
Found in Radio Electronics, this filter is suitable for attenuating up to 40 dB for AM radio...
This TTL module can be used in counter and many of them can be cascaded to counts up to 99, 999,...
This circuit was found in the Texas Instruments 1996 linear applications manual. It consists of a...