Thermocouple amplifier (CB9844E)

Found in documentation from the 90's, this circuit can be implemented based on modern operational amplifiers. The power supply must be symmetrical.

Precision Booster (CB9000E)
Found in a 1980s publication, this circuit uses an operational amplifier from that time. The...
Electronic Fuse (CB10445E)
This circuit was published in an Italian magazine Radio Elettronica in February 1976. The...
5 mA Constant Current Source (CB25615E)
This constant current circuit was found in the October 1993 Electronics Now magazine. The current can...