SU1336116A1 - Information search unit for associative storage device - Google Patents

Abstract

The invention relates to computing and allows for a quick associative search for ex-sample values or sorting in data arrays. The purpose of the invention is to expand the field of application of the -block by performing a search among the numbers represented in the Fibonacci codes. The search block is a finite state machine with four internal states, contains triggers 1 and 2, six elements AND 3-8 and three elements OR 9-11 and has inputs 12-15 and outputs 16 and 17. The input 12 of the block is connected to the output of the corresponding register of the sign, from which the code comes in bits, starting from the highest bit. Input 13 is connected to the output of an external element OR, to the inputs of which are connected the outputs L 7 of all information search blocks used in the associative memory. The inputs 14 and 15 are given synchronization and setup signals. The level of the logical unit at the output of the 16th block signals the extremity of the corresponding characteristic. 3 ill., 1 tab. (L with 00 O) O) ig. f

Description

113361

The invention relates to computing, in particular, to storage devices, and can be used in automated control systems for solving recognition problems.

The purpose of the invention is to expand the scope of the block by performing a search among the numbers represented in Fibonacci codes.

FIG. 1 shows a functional diagram of an information retrieval unit for an associative memory device; in fig. 2 is a functional 15 diagram of an associative memory device in which the proposed blocks are included; in fig. 3 is a graph of states and block transitions. information retrieval, which explains his work, 20

The information retrieval unit (Fig. 1) contains the first 1 and second 2 triggers, AND 3-8 elements one through six and elements OR 9-11 one through three, inputs 12-15, and outputs 16 and 17. 25

In the associative memory device (Fig. 2) on the information search blocks 18, the inputs 12 of the blocks are connected to the outputs of the corresponding registers 19 signs, the inputs 13 are connected to the 30 output of the OR element 20, the inputs 14 and 15 are connected to the synchronization input 21, and the installation input 22 ; the outputs of the 16 blocks are the outputs 23 of the associative memory 35, and the outputs 17 are connected to the corresponding inputs of the OR element 20.

The graph (Fig. 3) reflects state 24-27 from the first to the fourth and possible transitions in block 18 of information retrieval. In the upper tires of the graph in the form of a fraction are the values of the functions s. - and w. (numerator of a fraction), 5 defining a block-state, and binary codes corresponding to the states of the first 1 and second 2 triggers (denominator, from left to right) for given. states of the information retrieval unit 50.

The information retrieval unit for the associative memory device operates as follows.

In the initial state, the initial setup signal on input 22 triggers 1 and 2 are set to the state corresponding to vertex 24 of the graph.

162

The entire search takes m ticks (where m is the size of the signs), in each of which the next bits from the registers 19 are read (starting from the oldest ones), are analyzed taking into account the previous states in blocks 18 and by the sync signal from input 21, blocks 18, new states are fixed.

The operation of the associative memory device, which includes blocks 18, is based on an iterative calculation of functions

5G - (- G. G. G., .-.: .. .. -k.-h ..

Where

U) j

.f) -i „18

j-13

Jm

 . i.

 T x., F (J-J)

(X V.

f j-z

x

Cj-jl

are defined similarly); x., e fO,

0 at j / 0,

l

1pri.j Oh,

.F (j-l) + F (j-2) with j 7 0,

J 1, in;

i, 1 1, n. (n is the number of signs).

The x -J value is a record of the j-1 high-order Fibonacci codes of the x attribute.

x y x .. f (m-j) ..

Then

 ; .. G "-G -, - ,,.

All possible transitions in the information retrieval unit depending on the values and (taking into account the use of Gi-l1 Г i-7t

the current state WVf i 0), the values x,; -, x j. ,

X

i

 m and XX

M

1, n, k i;

Yu

.

U)

 k ((e o

and the value of g (initial setup signal) is given by the transition table.

.about

about

-one

(-)

oh oh

(-)

-1 o

(-)

h about

(-) (-) (-)

Therefore, for implementation: an iterative procedure has been proposed for a block of state graphs and transitions of which has four vertices.

The first vertex of the graph 24 corresponds to LJ the second vertex 25 corresponds to wye 1 i О, the third vertex 26 O,; j -1, and the fourth vertex 27 corresponds to

(,,) V (2u, .r + -.u, 4-3).

If the inputs 12 of the blocks 18 are supplied with the direct values of the bits of the feature codes, the unit signals at the outputs 23 mark the maximum signs, and if the inverse values of the bits are the minimum,

Claims (1)

Invention Formula Information retrieval unit for an associative memory device containing the first and second triggers, from the first to the sixth elements AND, the first element of SHS, and the direct output of the first trigger is connected to the first input of the third element AND, and is the output of the search result of the block, the second input of the third element AND is indicative block input, output of the third element AND — output of the block state, direct input of the first and inverse input of the second element AND are combined and are informational input of the block, direct output of the second flip-flop is connected to the first input the fourth And, the output that is connected about -one . about (-) about o (-) -1 o (-3 oh oh oh oh oh oh 25 thirty to the first input of the first element OR whose output is connected to. the input of the asynchronous installation in 1 of the first trigger, the inverse output of the second trigger is connected to the direct input of the fifth element AND, characterized in that, in order to expand the range of application of the block by performing a search among the numbers represented in the Fibonacci codes, the second and the third element OR, and the inverse input is the first and the direct input of the second element AND 35 are connected to the sign input of the block. ka, the output of the first element AND is connected to the inverse input of the sixth element I. and the first input of the second element of the RSHI, the second input of which is connected to the output of the fifth element AND, the output of the second element OR is connected to the input of the asynchronous installation of the first trigger, the output of the second element I is connected to the second input of the fourth and inverse input of the five elements I, the direct output of the first trigger is connected to the direct input of the sixth element I, the output of which is connected to the first input of the third 50 of the OR element, the output of which is connected to the input of the asynchronous installation in 1 of the second trigger, the direct output of which is connected to the third input of the third element AND, the input asynchronously 55 settings in O of the first trigger are connected to the inverse output of the first trigger, the second inputs of the first and third OR elements are combined and are the setup input of the block. yy g / Fi.g Fig 5 Compiled by B, Rudakov Editor A. Kozoriz Tehred I., Popovich Proofreader S. Cherni 4051/50 Circulation 589 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