High-gain amplifier (CB9019E)

Found in old American documentation, this circuit makes use of operational amplifiers from the 70s that are not common today.

| Clique na imagem para ampliar |

Infrared alarm (CB7238E)
Found in 1968 Mullard documentation, this circuit uses period components. The transistors are...
Voltage Multiplier (CB20184E)
In the figure we have a modified multiplier circuit that can operate with the sextuplicator with...
Low frequency converter (CB9336E)
This circuit converts signals from the 350 to 500 kHz band to the 4.36 to 4.5 MHz band, enabling...