Micro amplifier (CB23672E)

This three-transistor circuit was found in Radio Electronics magazine from May 1969. The circuit is for hearing aids and has earphone listening.

| Clique na imagem para ampliar |

Optical receiver (CB20697E)
Found in an American documentation from the 90s, this circuit works as a receiver for a data...
5 W Amplifier with Germanium Transistors (CB14765E)
This experimental amplifier was found in the 1960 Mullard transistor reference manual. The...
Resynchronizer Circuit (CB20096E)
This circuit makes use of an uncommon TTL component today, but it can be implemented with...