Voltage to Frequency Converter 2 (CB9448E)

Found in an EDN from the 90s, this circuit uses operational amplifiers from that time, which are uncommon nowadays.

| Clique na imagem para ampliar |

VHV generator (CB17617E)
This circuit generates very high voltages using an old TV flyback. The transformer has a secondary of...
Small Transistor Amplifier (CB20307E)
This fraction watt amplifier uses transistors that are still quite common in our market. The power...
Switching for EMG (CB7373E)
This circuit was obtained in documentation on medical applications from 1966. The circuit is used in...