公开(公告)号：US3509474A

公开(公告)日：1970-04-28

申请号：US3509474D

申请日：1967-11-09

Applicant: IBM

Inventor： ARNOLD ROBERT W ,  GREESON JAMES C JR

IPC: G06G7/25 ,  H03K5/20

CPC classification number: G06G7/25

公开(公告)号：US3609565A

公开(公告)日：1971-09-28

申请号：US3609565D

申请日：1969-12-29

Applicant: IBM

Inventor： ARNOLD ROBERT W

IPC: G01R19/00 ,  G01R19/30 ,  G06G7/25 ,  H03K5/20

CPC classification number: G01R19/30 ,  G01R19/0038 ,  G06G7/25

Abstract: A system for identifying and selecting the maximum or minimum value signal from among a plurality of signals. The system includes an amplifier for each input signal. The outputs of the amplifiers are connected to a common load through individual diodes. A negative feedback connection is provided from the load to an amplifier input. The polarity of the voltage drop across the diodes is monitored to determine the diode which is forward biased. This indicates the amplifier with the extreme valued input signal. A second set of diodes across the amplifiers limits the output voltage to reduce overload conditions.