Other amplifiers of the series like the MC3301, MC3401 and LM2900 can be used in this circuit. We found this setting on Motorola's Linear Interface ICs. The circuit uses a magnetic sensor.
Using the well-known SAA1027, this circuit serves as interface for PC. No English documentation was found...
Found in a 90’s American documentation, this circuit indicates the frequency of input pulses up to 1...
With the circuit shown, you can have a fast response with a Darlington configuration. The circuit is...