FM Demodulator (CB6196E)

This 80's Exar circuit has a carrier detector for frequencies up to 500 kHz. The circuit uses a company 567 which is still a common component.

| Clique na imagem para ampliar |

Precision AC-DC Converter (CB1237E)
This circuit converts an AC signal into a voltage of the same peak value with precision and is...
Parallel Port Interface for PC (NI021E)
This application is not modern since few computers have parallel ports. But you can use this...
Vibration sensor (CB7442E)
Found in National Semiconductor documentation from the 90's this circuit uses a piezoelectric sensor....