SU1432501A1 - Device for comparing numbers - Google Patents

Abstract

The invention relates to computing and is intended for use in information conversion and processing systems. The aim of the invention is to improve the speed and simplify the device. The device will hold two n-bit registers 1 and 2, light source 3, two groups of optical switches 4 and 5, elements OR 6 and 7. The numbers from registers 1 and 2 are bit-wise compared on optical switches. The bitwise comparison results go to the inputs of the OR elements, made in the form of focons, and then to the output § of the device. I il. (L

Description

one

 14

  The invention relates to computing and automation and is intended for use in information conversion and processing systems.

The purpose of the invention is to increase the speed and simplify the device.

The drawing shows a diagram of the proposed device.

; The device contains p-bit registers 1 and 2, light source 3, the first 4 and second 5 groups of optical switches, the first 6 and second 7

01 a.

and b; matched pair of optical

t I

Switches 4. and 5. The comparison process takes place as follows. The light from the source 3 is fed to the input 11 of the optical switch 4 ,,. If a

 B, (a, o, b,

one

or a, 1

0), an optical switch D connects input 11 to output 8, i.e. the light enters the input 11 of the switch 5. If aO, the switch 5 connects the input 11 to the output 12 and the light enters the element OR 6, causing the output 15 of the device

optical switch, control electrodes 9 and tO of the optical switch {switch, input 11 and output 12 of the equality of the optical switch, 20 Output 13 logical zero of the device, 1 OUTPUT of equality 14, Less than 15 and More than 16 devices.

I The device works with the following .25

I Optical switch with a zero I potential difference between the electrodes 9 and 10 transmits light from the input;. 11 to output 12, and with a difference to the input elements OR, 15 light, which means that B, form of focons, output of 8 inequalities, since the highest bits of the numbers a

and b do not coincide, and a 0. If a, 1, switch 5, connects input 11 to output 8 and light enters the element OR 7, causing the appearance of an optical signal at output 16 of the device, which means that A B ,

since older bits

and b not

are equal, and a, 1. And if a, b, i.e. the higher bits of the numbers A and B are equal, the light from source 3 through the optical switch 4 closed at the output 12, is fed to the input 11 of the switch 42- On a pair of switches

the corresponding unit

Tents,

A voltage level 1 between the electrodes | gi 9 and 10 transmits light from the input 1 to the output 8.

. Power circuits, as well as input circuits compared; The numbers and the reset are registered. The contact positions of all the optical switches are shown for the case when between their electrodes 9 and 10 there is zero potential difference, which takes place in the initial state when the registers 1 1 2 are set to zero. In this case (tBeT from source 3 through the switches closed at output 12, it enters output 14 of the device, the presence of light on which indicates the equality of the codes recorded in the register

1 and 2. At the same time, the optical signal is absent at the outputs 15 and 16 of the device. Let register 1 be written binary

.one

., a „, and in the recoding of the number A: a, and

gistr 2 - the binary code of the number B: b. ,, ,,

bj, ..., bp, where a and b are the highest bits of the codes, and a and b are the younger ones. Similarly, the registers 1 and 2 correspond to a pair of optical switches. For example, I will give

since older bits

and b not

4 and

are equal, and a, 1. And if a, b, i.e. the higher bits of the numbers A and B are equal, the light from source 3 through the optical switch 4 closed at the output 12, is fed to the input 11 of the switch 42- On a pair of switches

5 is analyzed following

five

d e

0

five

most significant bit of the first and second registers. If bits a and b do not coincide, the value of a (O or 1) gives the result of the comparison (B A or B A), and if these bits coincide, the light enters, at input 11 of switch 4, and then the process nor is it repeated.

If the bits of the same name are the same, an optical signal appears on device code 14, which indicates that A c.

Claims (1)

 Invention Formula A device for comparing numbers, containing two n-bit registers and a light source, characterized in that, in order to speed up and simplify the device, the first and second groups of optical switches, the first and second n-input elements, OR, focons, the first control electrodes of the optical switches of the first and second groups are connected to the outputs of the corresponding bits of the first register, the second control electrodes of the optical switches of the first group are connected to the outputs of the corresponding bits of the second register, the second control electrodes of the optical switches of the second group are connected to the logical zero input of the device, the light source output is optically connected to the input of the first optical switch of the first group, the equality output i-ro, where i 1, .., p-1, the optical switch of the first group is connected to the input (i + 1) -ro of the optical switch of the first group, the equality output of the n-th optical switch of the first group is the equality output of the device, the output of the inequality j-ro, where j 1, ..., p, the optical switch of the first group is connected to the input of the j-ro optical switch of the second group, the equality outputs of the optical switches of the second group are connected to the corresponding inputs of the first n-input The OR output element, whose output is the output of the Smaller device, the inequality outputs of the optical switches of the second group, are connected to the corresponding inputs of the second n-input element OR, the output of which is the output of the More device.