SU1476463A1 - Residue class optical adder-subtractor - Google Patents

Abstract

The invention relates to computing and can be used in optical processors using residual arithmetic in the pulse-position representation of operands. The aim of the invention is to enhance the functionality by generating an overflow signal. This goal is achieved by the fact that the optical module for adding and subtracting in the system of residual classes, containing a matrix of optical switches 1 and a photodetector 4, contains groups of optical switches 2 and a group of optical channels 9 with corresponding links. 1 il.

Description

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The invention relates to computing and can be used in the manufacture of digital optical processors using residual arithmetic in the pulse-position representation of operands.

The aim of the invention is to enhance the functionality by generating an overflow signal.

The drawing shows the scheme of the proposed optical module for addition and subtraction in the system of residual classes (for a module).

The module contains a matrix of optical switches 1, a group of optical switches 2, input 3 specifying the type of operation of the module, a photodetector 4, input 5 of the first operand of the module, input 6 of the second operand of the module, output 7 of the result of the module, output 8 of the module overflow signal, group of optical channels 9

In the drawing, the positions of the optical inputs and outputs of the module are indicated by circles, the numbers at the lines correspond to the values of the positions of the unitary code.

Switches can be used as optical switches.

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bodies on coupled waveguides or Bragg diffraction switches; both of them have a high switching efficiency, which makes it possible to confidently separate the signal levels at the output of the device, I

The module works as follows.

An optical pulse arrives at one of the inputs of the optical channels of the input 5 of the module, at the same time an electrical signal of the formation of a sign is sent (or removed) to all switches 2, to switches 1 of one of

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The input lines of the second operand from the input 6 of the module are provided with a switching signal. If the row position is O, the optical signal, without switching, passes through the channel-columns and goes out in the same position of output 7 of the module s as at the input. Otherwise, the optical signal reaches the switch 1 and from the left output of this switch 1 falls on switch 2, which addresses it on the next line, offset by the number of column positions equal to the position number of the switched row 1 switches. If the optical signal hits a column with a number from 0 to M; -1, it passes without switching to the output. If the optical signal goes to one of the optical channels 9, then it is partially read to the photodetector 4, and partially goes through the optical communication in one of the positions of output 7 of the module according to the rule (N) mod Mi where N is the channel number 9 "From the output The photodetector 4 then reads the overflow signal at the output 8 of the module. It should be noted that the generated overflow signal can only be used to determine the rank value in a subtractor constructed of the proposed optical modules.

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invention formula

Optical module for addition and subtraction in the system of residual classes, containing a matrix of optical switches of M columns and (M-1) rows (M is the value of the module) and a photodetector, and the bit inputs of the first operand of the module are connected to the optical inputs of the first row optical switches of the mat

The first optical output of the K-th optical switch (,., M) of the P-th row of the matrix (.,. М-2) is connected to the optical input of the K-th optical switch (P + 1) -th row of the matrix, optical outputs optical switches (M-1) -th row of the matrix are the outputs of the bits of the module's output, the inputs of the significant bits of the second operand of the module are connected to the control electrical inputs of the optical switches of the corresponding rows of the matrix, which are different in that enhancement of functionality due to the formation of a ne signal replenishment, it contains. (M-) groups of M optical switches in each and a group of 2 (M-1) optical channels, with the second optical output of the K-th optical switch a-th (... M-1) matrix rows connected to the optical input of the K-th optical switch of the a-th group; the control electrical inputs of the optical switches of the groups are combined and connected to the input of the task for the type of module operation, signal output

the overflow to the torso is connected to the electrical output of the photo-impinge, the first optical output B-th, where

B (P + 1) .., M, optical switch of the P-th group is connected to the optical input of the (B-P) -th optical switch (P + 1) of the matrix row, the second optical output of the (B-P) -th optical

the switch of the p-th group is connected to the optical input of the b-th optical switch (p + 2) of the matrix, the first optical output of the m-th and the second optical output of the first optical switch (the groups are respectively the outputs of the first and m-th bits the result of the module, the first optical output from the th ((.., a) optical coaxulator

The 0th group is connected via the (ac + 1) -th optical channel of the group to the photodetector input and is the output of the (M + a + c) th discharge of the module, the second optical output (m-c 1)

The 5th optical switch of the a-th group is connected via the (M + a-c) -th optical channel of the group to the photoreceiver input and is the output of the (a-c + 1) -th bit of the result of the module,

Claims (2)

An optical module for adding and subtracting residual classes in a system containing a matrix of optical switches from M columns and (M-1) rows (M is the module value) and a photodetector, the discharge inputs of the first operand of the module being connected to the optical inputs of the optical switches of the first row mat1 476463 <1, the first optical output of the Kth optical switch (K = 1,., M) of the Pth row of the matrix (P = 1 ,,. M-2) is connected to the optical input of the Kth optical switch ( P + 1) -th row of the matrix, optical outputs of optical switches (M-1) -th row of matrices s are the outputs of the bits of the result of the module, the inputs of the significant | q rows of the second operand of the module are connected to the control electrical inputs of the optical switches of the corresponding rows of the matrix, characterized in that, with 15 goals of expanding the functionality due to the formation of an overflow signal, it contains. ( M-1) groups of M optical switches in each and a group of 2 (M-1) optical channels, the second optical output of the Kth optical switch of the a-th (a = 1 ,,. M-1) rows of the matrix is connected to the optical input of the K-th optical switch of the a-group , 25 the control electrical inputs of the optical switch groups are combined and connected to the input of the job type of the module, the output of the overflow signal of which is connected to the electrical output of the photo signal, the first optical output of the Vth, where B = (P + 1) ,,, M, of the optical switch P-th group is connected to the optical input (BP) -go optical switch (P + 1) p oki matrix, the second optical output of the (Bp) th optical switch of the Pth group is connected to the optical input of the Bth optical switch (P + 2) -th row of the matrix, the first optical output of the Mth and the second optical output of the first optical of the switches (M -!) of the ith group are respectively the outputs of the first and Mth digits of the result of the module, the first optical output of the ith (c = 1 .., a) optical switch of the .th group is connected via (ac + 1) the optical channel of the group with the input of the photodetector and is the output of the (M-a + + s) -th discharge of the module result, the second matic output (M + 1-c) -th optical switch and the second group is connected through an (M-c) -th optical channel group to the input of the photodetector and is output (a-c + 1) -th module discharge result.