SU1068922A1 - Information input device - Google Patents

Abstract

A DEVICE FOR INPUT FORMATTING INPUT, containing a decoder, a multiplexer connected via an element switching matrix to the outputs of the first group of the decoder, a counter whose outputs are connected to the inputs of the decoder and the address inputs of the multiplexer and are the information outputs of the device, the first trigger, which output, which is the trigger, which output is the output multiplexer. the tracking signal of the device, the first delay element, the input of which is connected to the output of the multiplexer, and a pulse generator, characterized in that, in order to improve speed device by providing coding the ability to form codes for each closure of the contacts of the matrix of switching elements for pre-opening of previously closed contacts, it contains a block whose address inputs are connected to the counter outputs, and the output to the D-fex of the first trigger, a group of multiplexers whose information inputs through the matrix of switching elements is connected to the outputs of the second group of the decoder, and the address inputs to the outputs of the counter, the first OR element, whose inputs are connected to the multiplex outputs s, a second delay element having an input connected to the output of the first OR gate, the second flip-flop, D-input of which is connected. 1 output of the second delay element, and the direct output to the synchronization input of the first trigger, the inverse output and the S input of the second trigger are connected to the information input of the memory unit, the second OR element whose inputs are connected to (L output of the first delay element and the first output the pulse generator, respectively, and the output to the counter input and to the R input of the second, the third delay element, the output of which is connected to the write input of the memory unit, the first output of the pulse generator is connected to the R-BXO of the first trigger, the second output is generator pulses Dr is connected to the input of the synchronization flip-flop and the second input of the third delay -k element cs:. 00 with ts :) 1C

Description

The invention relates to automation and computing and can be used in keypads for data input in various data processing systems.

A device for inputting information is known, which contains groups of switching elements, a decoder, a switch, an element AND, and two counters connected in series with one another.

Closest to the proposed. is a device for inputting information containing a decoder, a multiplexer connected via a matrix of switching elements to the outputs of the first group of the decoder, a counter whose outputs are connected to the inputs of the relaxer and the address inputs of the multiplexer and are the information outputs of the device, the first trigger whose output is the output of the tracking signal of the device, the first delay element, the input of which is connected to the output of the multiplexer, and the pulse generator 2.

A disadvantage of the known devices is the need to pre-open the contacts of the switching elements previously closed to enable code generation when the contacts of the next switching element are closed, which reduces the reliability of the information set. In addition, in case of a malfunction of the switching element, in which its contacts remain permanently closed, it is difficult to search for an element, since the device is thus blocked. The purpose of the invention is to increase the speed of the device by allowing codes to be formed at each closure of the contacts of the matrix of switching elements for pre-opening of previously closed contacts.

This goal is achieved by the fact that in a device for inputting information containing a defifter, a multiplexer connected via a matrix of switching elements to the outputs of the first group of the decoder, a counter whose outputs are connected to the inputs of the decoder and address inputs of the multiplexer and are the information outputs of the device, the first trigger whose output is the output of the device tracking signal, the first delay element, whose input is connected to the multiplexer output, and the pulse generator, is entered into a memory block, ad The integral inputs of which are connected to the outputs of the counter, and the output to the D input of the first trigger, a group of multiplexers, whose information inputs are connected to the outputs of the second group of the decoder through the matrix of switching elements, and the address inputs to the outputs of the counter, the first element OR, the Kotoporo inputs are connected to the multiplexer outputs, the second delay element, the input of which is connected to the output of the first And / lil element, the second trigger D input of which is connected to the output of the second delay element, and the direct output - to the input of this chronicle of the first trigger The mountain, the inverse output and the S input of the second trigger are connected to the information input of the memory unit, the second OR element, whose inputs are connected to the output of the first delay element and the first output of the pulse generator, respectively, and the output to the counter input and to the R input of the second trigger, the third delay element, the output of which is connected to the recording input of the memory unit, the first output of the pulse generator connected to the R input of the first trigger, the second output of the pulse generator connected to the synchronization input of the second trigger and the third input its delay element.

FIG. 1. Represents a structural electrical circuit of the proposed device; pas figs. 2 - time diagram of the series named 1ul1, -op from the first and second outputs of the synchronization node.

The device contains a matrix of switching elements consisting of columns I-8, a decoder 9, multiplexers 10-13, the first element OR 14, the third delay element 15, a memory block 16, a counter 17, from the outputs of which the generated code is removed, the second element 18 delays,

 the second 19 and first 20 triggers, from the output 21 of which the signal accompanying the generated code is removed, the first delay element 22, the second element OR 23, the pulse generator 24, the first output 25 of which receives a series of pulses C1,

g and at the second exit 26 - a series of pulses C2.

For column switching elements I-5, the mode of operation provided by known devices is maintained.

Columns 6--8 contain elements of a commutation, with each closure of contact-. The codes of which form the corresponding codes without the need for preliminary opening of the contacts of the switching elements that were previously closed. The device works as follows.

Pulses of the C1 series of the first output 25 of the generator 24 pulses through the second element OR 23 are fed to the input of the counter 17, which is triggered by a positive voltage drop at its input. The signals from the output of the counter 17 are fed to the inputs of the decoder 9, forming the polling signals of the vertical buses of the matrix of switching elements, to the address. , e multiplexer inputs providing polling burn

 horizontal tires of the matrix, and addressable

1 inputs of memory block 16. Each switching element corresponds to a specific counter state -17 and a cell with a specific address in memory block 16. If no switching element is closed, the triggers 19 and 20 are constantly reset, in the whole cell of memory block 16, unit signals of the C2 series are occupied by single signals from the inverse output of the second trigger 19. When the contacts of one of the switching elements of columns 6-8 are closed, after setting the counter 17 to the state corresponding to this switching element, at the output of one of the multiplexers 11-13 a single signal is received, which through the first element OR 14 and the second delay element 18 is connected to the D input of the second TpTirrepa 19, after which the positive With the differential pulse of the series-C2 from the output 26 of the pulse generator 24, the second flip-flop 19 is cocked, since its R-input at this time contains a single signal from the output of the second element OR 23, due to the unit level of the C1 series at the input of the specified element. The cocking of the second flip-flop 19 causes a positive voltage drop at the synchronization input of the first flip-flop 20, at which the first flip-flop 20 is cocked, since at its D input there is a single signal from the block output

16, and its R-input is the unit level of the C1 series. The charging of the first flip-flop 20 leads to the appearance of a tracking signal at the output 21 of the device, allowing the receiver to receive the switching element code from counter 17. After the charging of the second switch 19 and the first flashing switch 20, the unit level of the C2 series goes through; the third delay element 15 is set at the input of the recording of the memory block 16, to which at the address corresponding to the closed one;

; the switching element is written zero; a signal from the inverted output of the cocked second trigger 19. The third delay element 15 provides a delay in; The first signal is from the output of the memory block 16 for the time needed to reliably re-in this trigger. Triggers 19 and 20 are reset by the zero level of the C1 series.

With subsequent meter installations

17v state corresponding to the previous lock-. switching element, the second three;

Ger 19 will be set every time; the first trigger 20 will not be cocked at this time, since at its time there is a recorded early zero zero signal at its D input.

5 Since the counting register 17 continues counting and a continuous interrogation of the matrix of switching elements is performed when the contacts of the next switching elements of columns 6 to 8 are closed, the described process is repeated and successive codes are generated.

0 When previously closed contacts of the switching elements are opened, when counter 17 is installed in the state corresponding to these switching elements, the second trip 19 is not cocked and single signals are written into the cells of the memory block 16 with addresses corresponding to the switching elements with open contacts.

Thus, the generation of codes is achieved when the contacts of any number of switching elements of columns 6–8 are closed.

The first and second elements 18 and 22 of the delay serve to prevent the triggering of the second flip-flop 1 and the erroneous changes in the state of the counter 17 under the influence of the hub. Protection against interference is also provided by selecting the period of the complete cycle of the counter 17, exceeding the bounce time. The construction of the keypad on the base ,, П1) of the supplied device allows cy-j

0 significantly. Increase productivity

Yes, the operator when entering arrays of information. In addition, the operational characteristics of the device are increased by

compared with existing due to the fact

that a malfunction of one or several

5 switching elements at which their

the contacts remain permanently closed,

does not block all keys,

which significantly reduces search time

malfunction.

rt Ensuring that the device is non-0J-.

the dependence of the formation of codes by keys on the state of other keys only within the group of keys of the console intended for entering alphanumeric information allows saving equipment without reducing the operator's productivity in typing information.

i, 1

FIG.

Claims (1)

DEVICE FOR INFORMATION INPUT, containing a decoder, a multiplexer connected through the matrix of switching elements to the outputs of the first group of the decoder, a counter whose outputs are connected to the inputs of the decoder and the address inputs of the multiplexer and are information outputs of the device, the first trigger, the output of which is the output of the device tracking signal , the first delay element, the input of which is connected to the output of the multiplexer, and a pulse generator, characterized in that, in order to improve the performance of the device VA, by providing the possibility of generating codes for each contact closure of the matrix of switching elements for preliminary opening of previously closed contacts, it contains a memory block whose address inputs are connected to the counter outputs, and an output to the D-fexod of the first trigger, a group of multiplexers whose information inputs are through the matrix switching elements are connected to the outputs of the second group of the decoder, and the address inputs are to the outputs of the counter, the first OR element, the inputs of which are connected to the outputs of the multiplexers, W a swarm delay element whose input is connected to the output of the first OR element, a second trigger, whose D-input is connected to the output of the second delay element, and a direct output to the synchronization input of the first trigger, the inverse output and S-input of the second trigger are connected to the information input of the block memory, the second OR element, whose inputs are connected to the output of the first delay element and the first output of the pulse generator, respectively, and the output to the counter input and to I? the input of the second trigger, the third delay element, the output of which is connected to the recording input of the memory block, the first output of the pulse generator is connected to the R-bxod of the first trigger, the second output of the pulse generator is connected to the synchronization input, the second trigger, and to the input of the third delay element.