Full Comparator (CB6548E)

Applying an operational of the time, this circuit of an old documentation can be elaborated with modern operational. The feed must be symmetrical.

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Pierce Harmonic Oscillator (CB5116E)
This circuit can generate 10 MHz signals depending on the crystal and has excellent stability....
Digital Frequency Detector (CB13288E)
This TTL digital circuit from Texas Instruments documentation from the 1970s used the company's SN types...
Simple Transistor Tester I (CB18917E)
We found this simple transistor tester in a French publication in 1981. It uses a common analog...