This voltage inverter uses a small transformer. The circuit was found in the April 1995 issue of Electronics Now magazine. The output current is very low.
This preamplifier for magnetic cartridges was found in the February 1990 issue of Radio...
We find this circuit in an American manual from the 80's. The circuit can be implemented with more...
September 2016 - It can be obtained from Mouser Electronics the new integrated circuit µCC21520...