This 1970 Electronic Design circuit uses a varactor or varicap. The circuit divides the frequency of a 150 MHz signal by 2. Similar versions appear on this site.
This simple indicator circuit was found in a documentation from the 90s. Trimpots can have values...
This circuit provides two outputs of the same signal. One with the original phase and the other...
January 2017 – The bq35100 integrated circuit, a charge monitor and EOS for non-rechargeable...