Half Wave Fast Rectifier (CB5160E)

This 80's circuit can be made with current comparators. Rectification accuracy is 1% DC up to 100 kHz.

OK 1783B Commercial Megaphone (CB18360E)
We found this circuit from a commercial megaphone in a Japanese publication in 1967. The circuit is...
Driver Amplifier For 50 ohm Line (CB19846E)
This circuit is from an old operating manual and can be implemented with operationals types that...
Sound Booster Stage (CB9881E)
This circuit was originally created to increase the power of car radios of the 790s and 80s that...