Current to Voltage Converter (CB6101E)

This circuit was suggested by Analog Devices in 1980s documentation. The circuit has a grounded bias and sensor.

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Threshold Detector 555 (CB17241E)
We can use the trigger point of 555 to detect voltage levels or thresholds, in a circuit as shown...
Negative Voltage Regulator 723 (CB5460E)
The integrated circuit used in this regulator is not very common today. The circuit is from old...
White noise generator (CB22010E)
Using a CA3130 operational amplifier, this circuit was found in an English publication from 1977....