1 kHz low pass filter (CB7579E)

This filter can be implemented with almost any operational. The power suppply must be symmetrical.

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...