SU1325686A1 - Threshold logic element - Google Patents

Abstract

The invention relates to automation and computer technology and can be used to build devices for processing discrete information. The device includes a switch 1, a group of elements AND 2-1 ... 2-4, a group of elements OR 3-1, ... 3-4, inputs 4-7 setting the threshold, information inputs 8-12 devices, information output 13 of the device. Using switch 1, implementing the function to select one of the sixteen information inputs, the threshold logic device allows all threshold functions of five variables to be implemented: one or more of five, two or more of five, ..., five of five. 3 il. with 1C O1 Od 00 and

Description

The invention relates to automation and computing and can be used to build discrete information analysis devices.

The purpose of the invention is to expand the functionality of the device by implementing all the threshold functions of five variables.

FIG. 1 shows a functional diagram of the proposed device; in fig. 2 - the truth table of the proposed device when implementing all threshold functions of five variables (1 or more of 5, 2 or more of 5, 3 or more of 5, 4 or more of 5 and 5 of 5); in fig. 3 - truth table for the implementation of a number of other logical functions.

The threshold logic device contains a switch 1, a group of elements AND 2-1 ... 2-4 and a group of elements OR 3-1 ... 3-4, with the first inputs from the first to the fourth elements AND 2-1 ... 2- 4 groups are connected to the first inputs of the corresponding elements OR 3-1, .. 3-4 groups are the first to the fourth inputs 4-7 of the device threshold setting, the first to the fourth address inputs A1-A4 of the switch 1 are the first to the fourth information inputs 8-11 devices, fifth information input 12 of the device is connected to the second inputs of all elements And 2-1 .. 2-4 groups to the second input of the fourth element OR 3-4 groups, the output of the first element AND of the group is connected to the first information input B1 of the switch, the outputs of the second to fourth elements of AND 2-2 ... 2-4 groups are connected to the second inputs of the elements OR 3-1 ... 3-3 groups respectively, the information output of the first element OR 3-1 is connected to the second, third, fifth and ninth information inputs B2, OT, B5 and B9 of the switch 1, the information output of the second element OR 3-2 is connected to the fourth, sixth, seventh, ten, eleventh and thirteenth inf To the B4, B6, B7, B10, B11 and B 13 switch inputs, the information output of the third element OR 3-3 is connected to the eighth, twelfth, fourteenth and fifteenth information inputs B8, B12, B14 and B15 of the switch 256862

Pa, the information input of the fourth element OR 3-4 of the group is connected to the sixteenth information input B16 of the switch, the output of which is the information output 13 of the device.

The device works as follows.

Q Before starting work on the inputs 4-7 of the device, a threshold code is set: 1111 - one or more of five, 0111 - two or more of five, 0011 - three or more of five 15, 0001 - four or more of five , 0000 - five out of five. After supplying the inputs 8-12 with one-bit variables, a high potential (logical 1) at the output 13 of the device

20 appears only if the number of unit variables meets the threshold criterion.

The truth table for this mode of operation is shown in FIG. 2

2S

It can be noted that if inputs 0–12 instead of part of the variables are supplied with zero or unit potentials, then, depending on the threshold code, the device implements a series of non-threshold logic functions. The truth table of the device for this mode of operation is shown in FIG.

Claims (1)

Invention Formula A threshold logic device containing a switch, the information output of which is an information output of the device, it is notable that, in order to expand the functionality of the device by implementing all the threshold functions of the five variables. a group of elements OR, the first inputs from the first to the fourth elements of the AND group are connected to the first inputs of the corresponding elements of the OR group and are from the first to fourth entry thresholds the devices, the first to the fourth address inputs of the switch are the first to the fourth information inputs of the device; the information input of the commutator, the outputs from the second to the fourth elements AND groups are connected to the second inputs from the first to the third elements OR groups, the information output of the first element OR is connected to the second, third, fifth and ninth information inputs of the switch, information output the second element OR is connected to the fourth, sixth, the seventh, tenth, eleventh and thirteenth information inputs of the switch, the information output of the third element of the 1S group is connected to the eighth, twelfth, fourteenth, and fifteenth information inputs of the switch, the information output of the fourth element OR is connected to the sixteenth information input of the switch. 2 Editor G. Gerber Compiled by A, Mishin Tehred And, Popovich Proofreader V. Butt ha, . Order 3124/55 Circulation 901 Subscription VNIIPI USSR State Committee for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5 Production and printing company, Uzhgorod, st. Project, 4 Yu Ni