This TTL circuit found in the September 1996 issue of Electronics Now magazine doubles the frequency of a rectangular signal. The power supply must be 5 V.
This filter was found in Texas Instruments documentation from the 1980s. The circuit uses a common...
We found this circuit in an old documentation, but it can be easily assembled, as it is based on...
For reference only, this is the second IF amplifier stage of a common transistor radio from the...