Photodiode selective preamplifier (CB7816E)

Found in American documentation, this circuit for modulated infrared signals can be tuned to a certain frequency. The photodiode can be of any type.

| Clique na imagem para ampliar |

Time-out comparator (CB9585E)
This interesting comparator circuit was found in an old Motorola documentation. The integrated circuit...
Constant Current Source (CB6625E)
This two-transistor constant current source is from a 1968 documentation. Modern equivalent...
Frequency Deviation Indicator NE567 (CB12671E)
An interesting application that finds applications in industry, especially when fluctuations in...