SU1410015A1 - Data input device - Google Patents

Abstract

The invention relates to the field of automation and computer technology and can be used to enter information into various digital devices. The object of the invention is to simplify the device. The device comprises a generator 1, a counter 2, a decoder 3, switching elements 4, a trigger 5 and a register 6. The information code is removed from the counter and is written to the register at a certain moment in time corresponding to the control signal (logic ) from the decoder to the currently closed switching element, through which the control signal arrives at, a trigger, which determines the moment of recording the current state from the counter. into the register by forming a pulse decay at the control input of the register. 2 Il. (L with

Description

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The invention relates to computing and can be used as a device for inputting information into a computer.

The aim of the invention is to simplify the construction of

Fig about 1 shows a diagram of the device; in FIG. 2 - diagram of the switching element.

The device for entering information contains a generator of 1 pulses, a counter 2, a decoder 3, switching elements 4, EC-flip-flop 5, register 6 "At that, the output of generator 1 is connected to the counting input of counter 2, the inputs of the decoder 3 are connected to the information inputs of register 6 and connected to the outputs of counter 2, the outputs of the decoder 3 are connected to com- puter components 4, the corresponding outputs of which are connected to the set inputs S and R of RS trigger 6 o The non-inverting output RS trigger 5 is connected to the control input of register 6, the outputs of which O are device outlets

The information input device operates in the following manner.

The generator generates pulses arriving at the input of counter 2, the code from the output of which goes to decider 3 and simultaneously to the information inputs of register 6. At the same time, the code is written to register 6 from its information inputs only at certain times corresponding to a certain counter state 2 "This is due to the fact that for each output of the decoder 3 a separate switching element 4 is connected, each of which allows controlling the state of the RS flip-flop 5, which, in turn, controls By writing a code to register 6 "At any time, one of the outputs of the decoder 3 contains a control signal (logical O), which through the switching elements 4 supports the RS flip-flop 5 in one state, since this control signal goes to S- the RS-flip-flop 5, the logic level O as a control signal is fed in turn to all switching elements, each subsequent code value of the counter 2 corresponds to the supply of the control signal to the queue

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Noah's switching element, which translates this signal into an active state, Io, is such a state that it is possible to control by writing code to register 6 with this switching element. Thus, each switching element can be assigned a corresponding code at the output of counter 2 and this code can be recorded in register 6. When one of the switching elements is closed and the control signal (logic O) is fed to it from the decoder 3, the RS- state. trigger 5 changes to counter south, i.e. RS flip-flop 5 goes to the zero state, as the control signal (logical O) is fed to its R input. As a result of a change in the RS-flip-flop 5 state, a falling pulse occurs on the control input of register 6 parallel information from the outputs of the counter 2 to the register 6 When this pulse arrives at the counter 2 from the generator 1, the state of the counter 2 and the position of the control signal at the output of the decoder 3 change by one, resulting in the control signal through the next switching element ie, finding schiys in the open state. That is connected to the B-input of RS-flip-flop 5, returns it to its original state. The device is ready to form a new code at the output of the register 6. Contact bounce does not impair the operation of the device, as RS-flip-flop 5 changes its state on decay The first impulse arising during bounce, and the subsequent ones, is not perceived, since it i has already been set to the required state depending on which inputs 8 or R turned out to be switched by the switching element to which at the given time code from the output of the descrambler torus Z o Therefore, the duration of switching transients depending on the type of switching elements does not affect the operation of the device

If an accidental failure occurs during the writing of the code into the register 6 because of any external influences (electrical pickups, current surges on the power supply circuit when high-power current consumers turn on and off)

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erroneous information, recorded in this case in register 6, can be corrected. This occurs in the next free from the cycle of operation of counter 2, when its value again corresponds to the closed switching element.

Formula

the invention

A device for entering information containing a pulse generator, the output of which is connected to the input of the counter, the outputs of which are connected to the inputs of the decoder and the information inputs of the register, the outputs of which are, thus, one of the commutations to the outputs of the device is connected to the inputs of the switching elements, characterized in that, in order to simplify the device, an RS-15 trigger is introduced into it, the inputs of which are connected to

In this state, the code corresponding to this switching element is periodically written into register 6, which eliminates the effect of accidental failures, thereby increasing the reliability of the information input device.

the corresponding outputs of the switching elements, and the output with the control input of the register.

Formula

the invention

the corresponding outputs of the switching elements, and the output with the control input of the register.

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Editor E, Kopcha

Compiled by A „Zhenin Tehred L. Serdyukova

Order 3480/44

Circulation 704

VPIIPI USSR State Committee

for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5

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Corrector L, Patay

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Claims (1)

Claim A device for inputting information containing a pulse generator, the output of which is connected to the input of the counter, the outputs of which are connected to the inputs of the decoder and the information inputs of the register, the outputs of which are the outputs of the device, the outputs of the decoder are connected to the inputs of the switching elements, characterized in that, in order to simplify the device , an RS trigger is introduced into it, the inputs of which are connected to the corresponding outputs of the switching elements, and the output to the control input of the register.