SU1659996A1 - Information input device - Google Patents

Abstract

The invention relates to the field of automation and computer technology and can be used to manually enter information into control and computing systems. The purpose of the invention is to simplify the device by reducing the number of switching elements. The device contains two counters, two decoders, a matrix of switching elements, a register, a trigger, an AND element, and a pulse generator. The device allows you to enter information from the keyboard in eight-digit codes using four switching elements. 2 Il.

Description

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The invention relates to automation and computing and can be used to manually enter information into control and computing systems.

The aim of the invention is to simplify the device by reducing the number of switching elements of the keyboard.

Figure 1 shows the functional diagram of the device for inputting information; figure 2 - functional register.

The information input device comprises a pulse generator 1, a first counter 2, a second counter 3, a first decoder 4, a second decoder 5, a matrix of 6 switching elements, a trigger 7, a HE element 8, a register 9, and an AND element 10.

The device works as follows.

In the initial state, the switching elements of matrix 6 are open. Trigger 7

is in the zero state, and in this case there is a zero level on the direct output, and a unit level on the inverse. At the output of the element NO 8, there is a zero level, which keeps trigger 7 in the zero state. Zero level. Direct output of trigger 7 blocks decoder 5, resulting in its outputs there are zero levels that block the inputs of register 9. At the outputs of register 9 there is a zero code. At the outputs of generator 1, there are pulses of continuous sequence that pass through element 10 and counter 2 produce their recalculation.

The decoder 4 decrypts all four states of counter 2, with successive zero-level signals appearing at its outputs. Counter 3 is in the zero state. Generator 1 pulses do not affect the contents of register 9.

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The character set is performed in four successive presses (cycles) of the information switching elements of the matrix 6.

Consider the operation of the device on the example of entering the number 9 in the code-8. The digit 9 is encoded in DKI-8 with the hexadecimal number F9 (11111001). When the third switching element of the matrix b is pressed for the first time when the counter 2 reaches state 11, the decoder 4 forms a zero level at its third output, which passes through this switching element and sets the trigger 7 to the one state. In this case, the zero level from the inverse output of the trigger 7 blocks the element AND

10. Counter 2 is set to

11. The single level of the direct output of the trigger 7 unlocks the decoder 5. The zero state of the counter 3 is decrypted by the decoder 5 and the zero output of the decoder 5 shows a single level by which the code (11) of the counter 2 according to the nearest impulse of the generator 1 enters the triggers 9-1 and 9-2 (FIG. 2) of register 9. As a result of the first pressing of the third switching element of matrix 6 in register 9, a code (11000000) is established. When the third switching element is released, trigger 7 returns to the initial state. By the difference from zero to one at the inverse output of the trigger 7, the counter 3 is set to the first state. The decoder 5 is blocked by the zero level from the direct output of the trigger 7, and the element 10 is unlocked by a single level from the inverse output of the trigger 7. The counter 2 will continue the recalculation of the oscillator pulses 1. The outputs of the decoder 4 are successively in zero levels, the contents of the register 9 are saved until next click. When the third switching element of the matrix 6 is pressed, similarly, the triggers 9-3 and 9-4 (not shown in Fig. 2) of register 9 enter the code (11) and the content code of register 9 becomes (11110000). When released, the content of counter 3 is increased by one and becomes equal to 2. When the second switching element is pressed, similarly, the second state (10) of counter 2 is rewritten into triggers 9-5 and 9-6 (not shown in figure 2) of register 9 and the contents of register 9 is set (11,111,000). When the second switching element is released, the counter code 3 increases and becomes equal to three (11). When pressing the first switching element of the matrix 6, the first state (01) of the counter

2 is blocked by an AND element 10 when the trigger 7 is set to one.

The decoder 5 is unlocked by a single level from the direct output of trigger 7 and

The third state of the counter 3 forms at the third (last) output of the decoder 5 a unit level that enters the gate output of the device.

For the unit level, from the third output of the decoder 5, the contents (01) of the counter 2 by the differential pulse of the generator 1 is rewritten into triggers 9-7 and 9-8 (Fig. 2) of the register 9. As a result, the outputs of the register 9 output the code generated by the device ( 11111001).

The proposed device allows the reduction of the full set of keys of a standard keyboard to four.

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Claims (1)

Invention Formula A device for entering information containing a matrix of switching elements, a pulse generator, the first the counter, the first decoder, the register, the trigger, the element And, the output of which is connected to the counting input of the first counter, the first output of the first counter is connected to the first input of the first decoder and the first, the third, fifth, seventh information inputs of the register, the second output of the first counter is connected to the second input of the first decoder and to the second, fourth, sixth, eighth information inputs the register, whose outputs are information outputs of the device, the outputs of the first decoder are connected to the matrix inputs of the switching elements, the output of the pulse generator is connected to the first input of the AND element, the inverse output of the trigger is connected to the second input of the AND element, characterized in that, in order to simplify the device, by reducing the number of switching elements in it has a second counter, a second decoder, and a NOT element, whose input and trigger installation input are connected to the output matrix of switching elements, the output of the element is NOT connected to the trigger reset input, the direct output of which is connected to the control input of the second decoder, and low-voltage outputs of the second the decoder is connected to the inputs of the lower resolution bits of the record the register, the high bit output of the second decoder is connected to the high bit input of the register write resolution and is the device sync output, the register sync input is connected to the output of the pulse generator, the counting the input of the second counter is connected to the inverse output of the trigger, the outputs of the second Extradition From C4.Z From -DCS otgen .1 FIG. 2 the counter is connected to the information inputs of the second decoder. 1 but § "about § U