Buffered Detector (CB6669E)

This circuit was found in 1967 General Electric documentation. The transistors of the time can be replaced by modern equivalents.

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Binary Counter (CB6139E)
This General Electric circuit is from the 80's. The PUTs used in this meter are not common...
White Noise Generator With the 741 (CB401)
This circuit uses a transistor as noise source and a 741 IC as amplifier, sourcing a high...
50kHz Photo Diode Amplifier (CB4578E)
In the figure we have a practical circuit for a 50 kHz bandwidth amplifier using a photo diode as...