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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Transistor as temperature sensor (CB21381E)
In the figure we have the configuration of a transistor as a temperature sensor. The circuit is...
High Input Impedance Stage (CB13397E)
We found this circuit in a 1977 National Semiconductor Databook. The circuit can use other FETs...
500 Hz Tone Emitter (CB13469E)
This circuit generates a control tone that serves to adjust amplifiers, check audio cables. The...