9 INTEGRATED ELECTRONIC DEVICES, NAMELY FUZZY SET COMPARATORS, FUZZY DATA CORRELATORS, NEUTRAL NETWORKS, FAST RAMP GENERATORS, VOLTAGE CONTROLLED ONE-SHOT CIRCUITS, FREQUENCY-TO-VOLTAGE CONVERTERS, TIME-TO-VOLTAGE CONVERTERS, FAST TRACK AND HOLD AMPLIFIERS; AND DEVICE TESTING SYSTEMS COMPRISING PROBES, PROBE CONTROL CIRCUITS, A DATA PROCCESSOR AND A POWER SUPPLY