SU1355972A1 - Information input device - Google Patents

Abstract

The invention relates to automation and intensifying technology and is intended to enter information into a digital device from a keyboard. The aim of the invention is to simplify and increase the reliability of the device. The device contains a block of switching elements, including decoupling elements 1 and 2 and a matrix 3 of switching elements, the element OR 4, the delay element 5, the element NOT 6, the one-shot 7, the register 8, the encoders 9 and 10. The invention eliminates false positives from chattering of switching elements and various capacities of mounting rows and columns and thereby increasing the reliability of operation. 2 Il. 77 WITH SL SP fie.

Description

The invention relates to automation and computing and is intended to enter information into a digital device from a keyboard.

The purpose of the invention is to simplify and enhance the reliability of the device.

Figure 1 presents the block diagram of the device; figure 2 - temporary

diagrams for which the operation of the device-jq begins.

The device contains a block of switching elements, which includes decoupling elements of 1 column and 2 lines and a matrix of 3 switching elements; element NOT, element OR 4 element 5 delay, element NOT 6, Single Vibrator 7, register 8, encoders 9, and 10, information outputs 11 and 1

The device works as follows.

In the initial state, all switching elements of matrix 3 are open. From the output of the one-shot 7 through the decoupling elements of columns 1, the signal O enters the matrix columns

3 and the inputs of the encoder 9, from the output of which O arrives at the information outputs 12 and the inputs of the element OR 4. From the output of the last, O sends to the delay element 5 and further to the input of the one-vibrator 1. From the output of the element HE 6 signal 1 through isolating elements 2 the rows are fed to the rows of the matrix 3 and the inputs of the encoder 10, from the output of which the binary code goes to the inputs of register 8. In the initial state, the outputs of register 3 are O.

The delay element 5, for example, may be performed using an RC master time. Chart 5 in Fig. 2 illustrates the operation of the smoothing RC chain of the delay element 5.

With the closure of the switching element of the matrix 3 at time C, the signal G of the row through the closed contact of the matrix 3 is fed to one

35

rows appear earlier than signal 1 appears on the columns, i.e. when only O. is present on rows and tables

30 When O is set on the rows, and on columns 1, through the closed contact of matrix 3, the signal 1 of one of the columns is fed to one of the rows and the input of the encoder 10, from the output of which the binary code is fed to the inputs of the register 8. When the pulse of the one-shot 7 decreases, the code of the string into register B, at the output of which the corresponding

40 line code, as well as setting 1 on the rows and O V on the columns. After establishing the signals, 1 row through the closed contact of the matrix 3 enters one of the columns

45 and the input of the encoder 9. At the output of the encoder 9, the column code of the matrix 3 appears. Thus, on the information outputs 11 and 12, a binary code is set, c6 corresponding to: the code is pressed; from the columns of matrix 3 and the input of the encoder-50 ° of the contact of matrix 3 which is stored 9. At the output of the encoder 9, a binary code appears corresponding to the closed contact of the column of the matrix 3, which is fed to the inputs of the element

until the moment of contact opening.

When the contact of matrix 3 is softened at all inputs and codes of pinfractor 9, the element OR 4 is set to O. At the same time, the information at the output of register 8 is preserved.

OR 4, from the output of which 1 is delivered to delay element 5. Figure 4 (figure 2) shows the signal at the output of the element OR 4, since the time of contact. Diagram 5 shows the signal at the output of delay element 5, which is triggered at time t. after the completion of contact bounce. A single-shot 7 with a positive edge of signal 1 at its input produces a positive pulse at the output, along the front

Cess on the matrix 3.

Thus, from the moment t, a change in the signals on the columns (from 0 to 1 - diagram 1, figure 2) and to the lines (from 1 to O - diagram 6) begins. If the capacity of the installation is on. columns are larger than on rows of matrix 3, then the signal change on the columns is slower than on rows.

time

In this case, there are races between the signals of the rows and columns, which through the encoder 9 arrive at the element OR 4. At the output of the element OR 4, a false pulse arises

5 when signal o on

time

rows appear earlier than signal 1 appears on the columns, i.e. when only O. is present on rows and tables

When O is set on the rows, and on columns 1, through the closed contact of matrix 3, the signal 1 of one of the columns is fed to one of the rows and the input of the encoder 10, from the output of which the binary code is fed to the inputs of register 8. When the one-shot pulse drops, the code is written lines to register B, at the output of which the corresponding

line code, as well as setting 1 on the rows and O v on the columns. After establishing the signals, 1 row through the closed contact of the matrix 3 enters one of the columns

and the input of the encoder 9. At the output of the encoder 9, the code of the matrix 3 column appears. Thus, at information outputs 11 and 12, a binary code is set, c6 corresponding to:

until the moment of contact opening.

When the contact of matrix 3 is softened at all inputs and codes of pinfractor 9, the element OR 4 is set to O. At the same time, the information at the output of register 8 is preserved.

Thus, a pre / retartable device allows you to eliminate false

31355972

operation, devices from a tinkling sound of switching elements and various capacities of mounting of lines and columns and. thereby increasing the reliability of operation.

The inclusion of the register and the OR element after the encoder allows us to simplify dkeMy and reduce the register size and the number of inputs of the NL element.

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Claims (1)

Invention Formula A device for entering information containing a block of switching elements, two encoders, a register, an element of NOT, an element of RSHI, the first outputs of the block of switching elements are connected to the inputs of the first encoder, the outputs of which are the outputs of the first group of device, the recording input O five 0 the register is combined with the first inputs of the switching elements block, which is due to the fact that, in order to simplify and increase the reliability of the device, sequentially connected delay elements and a single vibrator are introduced into it, the output of which is connected to the element input NOT and the first inputs of the switching elements block, the second the outputs of which are connected to the inputs of the second encoder, the outputs of which are connected to the information inputs of the register, the outputs of which are the outputs of the second group of the device, the output of the element is NOT connected to the second E inputs of block switching elements, outputs of the first encoder. connected to the inputs of the OR element, the output of which is connected to the input of the delay element. t3 / t5 Phie. 2 Compiled by I. Karnov Editor I. Rybch.enko Tehred A. Kravchuk Corrector M. Sharoshi  T. -.- L - r -Y ---- - -Shsh -.-.-.-. -.-..---- - Order 579A, / 42 Circulation 671 Subscription VNIZhSH State Committee of the USSR for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5 Production and printing company, Uzhgorod, st. Project, 4