SU1566333A1 - Digital function generator - Google Patents

Abstract

The invention relates to automation and computing and can be used in spectral analysis systems, as well as in digital image processing and compression systems. The purpose of the invention is to simplify the generator. The generator contains Walsh function generation unit 12, shift register 13, adders 15 modulo two, counters 1, 3, 5, switch 8, trigger 7, elements OR 2, 4, 10, NOT 14, delays 6, 9, 11. Of due to the introduction of the third counter, switch, trigger, two OR elements and two delay elements, two memory blocks are excluded. 1 il.

Description

The invention relates to automation and computing and can be used in spectral analysis systems, as well as in digital image processing and compression systems.

The purpose of the invention is to simplify the generator.

The drawing shows the Fuktsionalna-generator circuit.

The generator contains counter 1, element 2 OR, counter 3, element 4 OR counter 5, delay element 6, trigger 7, switch 8, delay element 9, element 10 OR, delay element 11, block 12 Normalization of Walsh Functions, register 13 shift, element 14 NOT, group of 15 modulo-two adders, recording control input 16, clock input 17 and output 18.

The generator works as follows.

The Walsh function Wai (K, M, X, Y) of two variables X, Y with parameters (numbers) K, M is the product of one-dimensional functions Wai (K, X), Wai (M, Y). When displaying the values of 1, -1 functions with logical values O, 1, their product is displayed as modulo two.

The values of KO, N-1 are sequentially counted by the counter 3, the values of M O, N-1 by the counter 5, where N 2 is the dimension of the system of functions n is the counter size of the counters. In this case, the transition to the next value of M occurs after a complete enumeration of the values of K.

The readings of the values Wai (K, M, X, Y) are represented by the matrix formed by the N-vectors of readings of the values Wai (K, X) -and Wai (M, Y): the element (i, j) of the matrix is the product (the sum over module two) Wai (K, i) Wal (M, j), where i, j O, N-1.

N-vectors are formed by a block 12 n of a given number K or M. At the same time, the vector of samples Wai (K, X) is rewritten into shift register 13, and the vector of samples Wai .. (M, Y) is fed to the inputs of adders 15 through module two directly from the outputs of block 12.

The counts Wai (K, X) sequentially, clock by clock, are shifted to the output of register 13 and through the element NOT 1 are received at the second inputs of the adders 15 modulo two (depending on the method of coding the values of

five

five

five

0

direct communication is possible - without the element HE 14). In the i-th cycle, at the outputs 18, the 1st c1-matrix die is formed. The jar matrix is filled in N cycles. N cycles are counted by counter 1.

The overflow signal of counter 1 proceeds to the next value K, writes the N-vector to the register 13, switches the trigger 7 (switching switch 8), Generates the N-vector with parameter 14 at the output of block 12 - this whole process is regulated by the elements OR 2, 4, 10, and elements 6, 9, 11 of the delay. Thereafter, the filling of the matrix with the next parameters K, M, etc. begins.

Claims (1)

Invention Formula A digital function generator comprising a Walsh function shaping unit, a shift register, modulo-two adders, first and second counters; the first OR element, the first delay element, the NO element, and the outputs of the Walsh function shaping unit are connected to the bit inputs of the shift register and to the first inputs of the corresponding modulators two, the serial output of the shift register through the element is NOT connected to the ground inputs of all adders over modulo t; va, modulo two adders are generator outputs, the first counter input and the shift register sync input are connected to the clock input of the generator, the first counter overflow output is connected to the input the second counter and the input of the first delay element, the first input of the first element OR is the control input of the generator, the output of the first element OR is connected to the control input of the record of the shift register, characterized in that, in order to simplify the generator, it contains the third counter, switch, trigger, second and third OR elements, second and third delay elements, the overflow output of the first counter is connected to the first input of the second OR element, the output of the second OR element is connected to the counting input of the trigger, the overflow stroke of the second counter is connected to the input of the third counter, the information outputs of the second and third counters connected to the inLorma-ion inputs of the switch, the uranium of the input of the switch is connected to the trigger output, the switch output is connected to the number input. Walsh function function block functions, the output of the first delay element connected to the first input of the third OR element the delay element is connected to the secondary inputs of the first and second OR elements and to the input; the third delay element, the output of the third delay element is connected to the second input of the third OR element, the output of the third OR element is connected to the control input of the function shaping unit Walsh.