SU935938A1 - Apparatus for data input - Google Patents

Description

(5) DEVICE FOR INPUT OF INFORMATION

one

The invention relates to computing and is intended to enter data into an information processing system, for example, into a computer.

 A device for inputting information is known, which contains a block of resistors connected to the key field and the inputs of the high and low encoders, the outputs of which are connected to the corresponding blocks.

The disadvantage of this device is its complexity due to the use of keys that do not have a bounce.

The closest technical solution to the invention is a device for entering information, containing groups of switching elements connected to restrictive elements, the first block of inverters and via keys to the second block of inverters 2.

This device is simple, however, it does not allow generating true information when pressing two keys with overlapping in time, as well as when using keys that have contact bounce. In this case, the formation of the given codes is possible at low speed.

, Q The purpose of the invention is to increase the speed of the device by realizing the possibility of obtaining true information when pressed with a temporary overlap, even

, 5 when using a key with bounce contacts.

The goal is achieved by inserting a pulse-generator into the device. owls, first and second counters, circuit

20 comparisons, the first and second registers, the first and second triggers, the elements 2И-OR, the one-shot and the decoder, the inputs of which are connected to the second outputs of the keys, the first

The output of the decoder is connected to the first inlet of the first counter, the output of which is connected to the first inlet of the first trigger, the second input of which is connected to the second input of the first counter, to the first input of the first register, to the output of the one-vibrator and to the second three | The first output of the device, the second output of the decoder is connected to the first input of the second register and the first input of element 2И-OR, the second input of which is connected to the output of the first trigger, the output of the first inverter unit is connected to the second input in The first register, the third input of which is connected to the output of the second inverter unit, the output of the second register is connected to the first input of the comparison circuit and to the second input of the first register, the output of which is connected to the second input of the comparison circuit and is the second output of the device, the output of the comparison circuit is connected with the first input of the second estimator, the second input of which is connected to the output re-i of the pulse pulse and with the third input of the first counter, the output of the second counter is connected to the second input of element 2I-OR, the third input of which is connected to Exit first flip-flop, 2I-OR gate output is connected to the input of monostable multivibrator.

FIG. 1 shows a block diagram of the device; in fig. 2 timing charts of the device.

The device contains a group of switching elements 1, restrictive elements 2, the first block of inverters 3 keys 4, the second block of inverters 5, the decoder 6, the second register 7, element 2И-OR 8, the first counter 9, the pulse generator 10, the second counter 1 1, the first the trigger 12, the one-shot 13, the first register k, the second trigger 15, the circuit 16, the first output of the device G / and the second output of the device 18.

FIG. 2 shows the time diagrams of the device, where a -, on the rotation of the code of the key A at the outputs of the first and second blocks of inverters 3 and 5; b - occurrence of the code of key B at the outputs of the first and second block of inverters 3 and 5; in - entry gates in the second register 7, arriving at its first input; g - the contents of the second register 7; e is the time interval formed by the element 2I-OR 8 by the first counter 9 and the first trigger, the value of which is greater than the bounce time by the key of the type used; e is the strobe entry in the first register 1A, formed by the one-shot 13; W - the contents of the first register 1.

The device works as follows.

Let pushed one out. switching elements 1 (key with code L, Fig. 2). From the second output of the decoder 6, the first input of the second register 7 receives a signal generated by pressing a single key and is a recording strobe in the second register 7. Code A is recorded in the second register 7, and since the contents of the first register 14 and the contents of the second register 7 different, the comparison circuit 16 unlocks the second counter 11. This pulse counter from the pulse generator 10 counts the time (slightly more than the time of the type used in the device.;. key) upon reaching which, through element 2I-OR 8, start coming off the monostable 13, forming the first write strobe register k. The contents of the second register 7 are rewritten into the first register H, and the comparison circuit 16 generates the inhibitory potential,

blocking the second counter 11, since the contents of the first and second registers 14 and 7 are the same. A second trigger 15 is charged with a pulse from the one-shot 13, which is a device readiness trigger for transmitting a code.

Let the second switching button be pressed as well (the key with the B code of Fig. 2). Then, on the output of the decoder 6, recording gates are formed in the second register 7 during the presence of bounce of the second switching element 1 (the code A is confirmed, Fig. 2c).

Then, the write gates to the second register 7 appear at the moment when the first switching element 1 is released and the code B is written to the second register 7. Comparison circuit 16

again enables the second counter 11, and through element 2I-OR 8 the one-shot 13 produces a recording strobe in the first register 14. If

two switching elements 1 are pressed so that there is a bounce both from one and from another switching element 1, then the signals from the decoder 6 in the second register 7 alternately record the code of one or the other switching element 1 until the bounce of one of the switching elements 1 does not stop. After this, the code of the remaining switching element 1 is recorded in the second register 7 (FIG. 2). Next, the contents of the second register 7 are written to the first register in the manner described.

If none of the switching elements 1 is pressed, then the signal from the first output of the decoder 6, which forms by the condition of not pressing any switching element, enables the first counter 9 to work. After a certain time, the first trigger 12 is charged by the signal from the output of the first counter 9 , allowing for the first write strobe in the second register 7 to start the one-shot 13 and form the write strobe in the first register 1. This enables the formation of a sequence of several identical s codes.

If the keyboard, as a result of contact bounce, has an input speed of up to 5 Hz, additions made in accordance with the proposed device using the same type of key make it possible to achieve an input speed of up to 20 Hz.

invention formula

A device for entering information containing groups of switching elements, the first outputs of which are connected to the inputs of a block of restrictive elements and the first block of inverters, the second outputs of switching elements are connected to the inputs of keys, the first outputs of which are connected

with inputs of the second block of inverters, characterized in that, in order to improve the speed of the device, a pulse generator, first and second counters, a comparison circuit, first and second registers, first and second triggers, element II-OR, one-shot and one descrambler whose inputs

0 connected to the second outputs of the keys, the first output of the decoder is connected to the first input of the first counter, the output of which is connected to the first input of the first trigger, the second input of which is connected to the second input

the first counter, with the first input of the first register, with the output of one / novibrator and with the input of the second trigger, the output of which is the first output of the device, the second output of the decoder is connected to the first input of the second register and the first input of element 2I-OR, the second input of which connected to the output of the first

5 trigger, the first block of inverters connected to the second input of the second register, the third input of which is connected to the output of the second block of inverters, the output of the second register

0 is connected to the first input of the comparison circuit and to the second input of the first register, the output of which is connected to the second input of the comparison circuit and is the second output of the device, the output of the Sahama comparison is connected to the first input of the second counter, the second input of which is connected to the output of the pulse generator and to the third the input of the first counter, the output of the second counter of the counter is connected to the second input of the element 2И-OR, the third input of which is connected to the output of the first trigger, the output of the element 2И-OR is connected to the input of the one-way radiator.

Sources of information taken into account in the examination

To the Patent of France (f 2232972, cl. G 06 F 3/02, published 1975, 0 2. USSR Copyright Certificate Wb585 7, cl. G About F 3/02, 1975 (prototype).

Claims (1)

Claim A device for inputting information containing groups of switching elements, the first outputs of which are connected to the inputs of the block of restrictive elements and the first block of inverters, the second outputs of the switching elements are connected to the inputs of the keys, the first outputs of which are connected 5938 6 with inputs of the second block of inverters, characterized in that, in order to increase the speed of the device, a pulse generator 5 is introduced into it, the first and second counters, the comparison circuit, the first and second registers, the first and second triggers, element 2 AND-OR , one-shot and decoder, whose inputs 10 are connected to the second outputs of the keys ^ the first output of the decoder is connected to the first input of the first counter, the output of which is connected to the first input of the first trigger, the second input of which is connected to the second input of the first counter, with the first input of the first register, with the output of one ~ ~ and with the input of the second trigger, the output of which is the first 20 output of the device, the second output of the decoder is connected to the first input of the second register and to the first input of the 2-OR element, the second input of which is connected to the output of the first 25 trigger, the output of of the first inverter unit is connected to the second input of the second register, the third input of which is connected to the output of the second inverter unit, the output of the second register 30 is connected to the first input of the comparison circuit and to the second input of the first register, the output of which is connected to the second input of the comparison circuit and is the second output of the device , _{35 the} output of the comparison circuit is connected to the first input of the second counter, the second input of which is connected to the output of the pulse generator and to the third input of the first counter, the output of the second _40th counter is connected to the second input element 2 AND-OR, the third input of which is connected to the output of the first trigger, the output of element 2 AND-OR is connected to the input of one-shot _{45 of the} speaker.