SU1105883A1 - Information input device - Google Patents

Abstract

A DEVICE FOR INPUTING INFORMATION containing a pulse generator, the first prohibition element, the first counter, a decoder, a multiplexer, a block of switching elements, a second prohibition element, the first And element, a trigger, the second counter, the outputs of the first and second groups of the first counter are device group outputs / the outputs of the first group of the first counter are connected to the address inputs of the multiplexer, and the outputs of the second group are connected to the inputs of the decoder, the counting input of the first counter is connected to the output of the second prohibition element, the first input is Secondly, it is connected to the generator output and the first input of the prohibition element, and the second input is connected to the trigger output, the decoder outputs are connected to the inputs of the switching elements block, the outputs of which group are connected to the multiplexer information inputs. The second input of the prohibition element is connected to the output of the second counter and the first input of the first element I, and the output to the counting input of the second counter, the second input of the first element I connected to the output of the multiplexer, and the output to the installation input of the trigger whose input is device, and output by device, characterized in that, in order to broaden the field of application of the device by providing the possibility of multiple input of the same character, the second element And, one-shot, t This prohibition element and the OR element, the output of the co.the second is connected to the reset input of the second counter, the first input is connected to the output of the one-vibrator, the input of which is connected to the output of the second element And, the first input of which is connected to the output of the multiplexer and the second input connected to the output of the switching element unit and the first input of the third zaproOt element, the output of which is connected to the second el input of the OR element. Eo eo & d

Description

The invention relates to computing and can be used to enter information from a keyboard into computers and information systems. The closest in technical essence to the present invention is a device for inputting information, containing a pulse generator, first prohibition element, first counter, de coder, multiplexer, switching element block, second prohibition element, first element, three ger, second counter, outputs The first and second groups of the first counter are the output of the device group, the outputs of the first group of the first counter are connected to the address inputs of the multiplex plexor, and the outputs of the second group with the inputs of the decoder, the count input of the first counter connected to the output of the second prohibition element, the first input of which is connected to the generator output and the first input of the first prohibition element, and the second input to the trigger output, the decoder outputs are connected to the inputs of the switching element block, the outputs of which are connected to the multiplexer information inputs, The second input of the prohibition element is connected to the output of the second counter and the first input of the first element I, and the output with the counting input of the second counter, the second input of the first element I connected to the output multiplexer And an output - with a mounting trigger input, a reset input which is the input device, and output - output device. The disadvantage of the known device, va is the limited scope of application, due to the impossibility of repeatedly entering the code of the pressed key. The purpose of the invention is to expand the field of application of the device by providing the possibility of multiple input of the same character. The goal is achieved by the fact that a known input device containing a pulse generator, a first prohibition element, a first counter, a decoder, a multiplexer, a block of switching elements, a second prohibition element, the first element I, a trigger, a second counter, the outputs of the first and second groups of the first the counter are the outputs of the device group, the outputs of the first group of the first counter are connected to the address inputs of the multiplexer, and the outputs of the second group are to the inputs of the decoder, the counting input of the first counter is connected to the output ohm of the second prohibition element, the first input of which is connected to the generator output and the first input of the first prohibition element, and the second input to the trigger output, the decoder outputs are connected to the inputs of the switching elements block, the group outputs of which are connected to the multiplexer information inputs b5, the first prohibition element connected to the output of the second counter and the first input of the singular element I, and the output to the counting input of the second counter, the second input of the first element I connected to the output of the multiplexer 5 and the output from the mouth The trigger input, the reset input of which is the device input, and the output output of the device, is additionally introduced the second element AND, the one-shot, the third prohibition element and the OR element, the output of which is connected to the reset input of the second counter, the first input is connected to the output of the one-shot whose input is connected to the output of the second element And, the first input of which is connected to the output of the multiplexer and the second input of the third prohibition element, the second input is connected to the output of the switching elements unit and the first input is the third th element of the ban, the output of which is connected to a second input of the OR element. The drawing shows a functional diagram of a device for inputting information. The device contains a pulse generator 1, the first prohibition element 2, the first counter 3, the decoder 4, the multiplexer 5, the block of switching elements b, the second element And 7, the one-shot 8, the counter 9, the third element of the ban 10, the element OR 11, the second element of the ban 12 , the first element And 13, the trigger 14, the Device operates as follows. In the initial state, the trigger 14 is set to O. The counting pulses from the output of the generator 1 are fed to the counting input of counter 3, interrogating the block b of switching elements. Counter 9 is full and allows the passage of pulses from multiplexer 5 through element 13. When the contact of the key is closed, the signal from one of the first (informational) outputs of block 6 through multiplexer 5 and element 13 sets the trigger 14 to ON, producing a signal. reading, and stops the counter 3. At the outputs of the counter 3 fixed code uncompressed keys. At the same time, the signal from Multi Plexor 5 is fed to the reset input of counter 9 through prohibition element 10 and element OR 11, if there is no control signal from the second output of block b, or through element AND 7, odovibrator 8 and element OR 11, if at the second output of the block 6 there is a signal. The single vibrator 8 generates a short pulse sufficient to reset the counter 9, Bounce pulses of the contact confirm the reset of the counter 9 to O.

The filling time of counter 9 is obviously longer than the interval between the bounce pulses of the key contact, so that for the contact bounce time, the counter 9 does not reach the final state and prevents the signal from multiplexer 5 from passing through the trigger 14, preventing it from turning on again if during the contact bounce time The information entered is read and a Reset signal is received.

In the absence of a signal from the second output of block 6, the established signal from multiplexer 5 is constant

keeps counter 9 in the state O. and thereby eliminates the re-issue of the signal Read permission

before releasing the key in case

if the reset signal is received, but

The key has not yet been released.

In the presence of the signal from the second output of the block 6. The signal from the output of the multiplexer 5 through the element And 7 enters the One-Oscillator 8, which

generates a pulse, the duration of which is sufficient to reset the counter 9, after the end of the contact bounce, the counter 9 counts to the final state and remains in it

state, save signal. Allow readout independent of incoming signal. Reset to re-read information.

Claims (1)

INFORMATION INPUT DEVICE, comprising a pulse generator, a first inhibit element, a first counter, a decoder, a multiplexer, a switching element block, a second inhibit element, a first AND element, a trigger, a second counter, the outputs of the first and second groups of the first counter are the outputs of the device group, the outputs the first group of the first counter is connected to the address inputs of the multiplexer, and the outputs of the second group are connected to the inputs of the decoder, the counting input of the first counter is connected to the output of the second inhibit element, the first input of which is connected to the generator output and the first input of the first inhibit element, and the second input to the trigger output, the decoder outputs are connected to the inputs of the switching element block, the group outputs of which are connected to the information inputs of the multiplexer, the second input of the first inhibit element is connected to the output of the second counter 'and the first the input of the first element And, and the output with the counting input of the second counter, the second input of the first element And is connected to the output of the multiplexer, and the output is with the installation input of the trigger, the reset input of which is is the input of the device, and the output is the output of the device, characterized in that, in order to expand the scope of the device by providing the possibility of re-entering the same character, the second element and, one-shot, the third prohibition element and the OR element are entered κο.-g of which is connected to the reset input of the second counter, the first input is connected | £ / 1 to the output of the single-shot, the input of which is connected to the output of the second element 1 ^^ And, the first input of which is connected | It is connected with the output of the multiplexer and the second input of the third element of the input, the second input is connected to the output of the block of switching elements and the first input of the third element is the output whose output is connected to the second input of the OR element. cl