Temperature to frequency converter (CB7325E)

This circuit was obtained in a Radio Electronics of the 90s. The circuit uses an integrated circuit that is not common today.

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Easy Start Astable (CB25654E)
We found this easy start circuit in Electronics Now magazine from December 1993. The frequency is...
Capacitive Load Amplifier (CB4903E)
We found this circuit in an old American documentation. The circuit can be applied to modern...
Differential Pair (CB6134E)
This differential amplifier, found in a 1964 Electronic Design, has a gain of 30. The setting can be...