SU785862A1 - Information input arrangement - Google Patents

Description

I

The invention relates to the field of computer technology and can be used in input devices for information into electronic computers. 5

Devices for inputting information into computers are known, comprising a keyboard, an encoder, a register, a trigger, a delay element, an OR element, and an inverter (1.

These devices have the non-abundance that the input information may be distorted when you press the keys and, as a result, the computer is incorrectly perceived. Correction of errors occurring during input should be performed by the operator, which requires additional time costs.

The closest technical solution is an information input device, which contains a set of keys, each of which, when pressed, changes the capacitance of one of the capacitor sets, the pulse generator sequentially sends 12.25 pulses to the capacitors.

The composition of the pulse generator includes a counter and a decoder that perceives the signals from the three minor bits of the counter and sequentially. giving pulses to each of the lines 30

keyboard. Signals from the keyboard columns are sent to the information inputs of the multiplexer, and signals from the three most significant bits of the counter are sent to the control inputs.

When a key is pressed, it is scanned by a decoder and a multiplexer, a press signal is generated, and the generator stops. The count recorded in the counter at the moment of stopping represents the key pressed and is fed to the memory input.

The disadvantage of the device is low noise immunity, since the generator can be stopped not only by a pressing signal, but also by interference due to the effect of front races resulting from temporary discrepancies between the three most significant bits of the counter arriving at one group of multiplex inputs. the three least significant bits of the counter, which are preDEFINED (resulting in a time delay), post: fall on the second group of multiplexer inputs.

The aim of the invention is to improve the reliability of input information

deterioration of the functional characteristics of the device.

The goal is achieved by the fact that in a known device for entering information, containing a register, a keyboard, one output of the closing contacts of which are connected to the output and a decoder, the inputs of which are connected to the outputs of the counter and the first input of the I block, other outputs of the keyboard are connected to the corresponding outputs device and to the inputs of the element OR the output of which is connected to the second inputs of the block of elements And, and with one of the outputs of the device, and the output of the block of elements And is connected to the information register moves.

The drawing shows a block diagram of a device for entering information.

The device for entering information contains 1sit keyboard 1, divided into n groups, decoder 2, outputs 3, signs of keystrokes of this group, counter 4, block of 5 elements, register 6, element .OR 7, output 8, keystroke.

The device works as follows. .

All device keys are combined into n groups, with no more than m keys in each group (the number m is equal to the number of counter states). For each group of keys, there is a sign. The first terminals of the switching elements of the corresponding keys all groups are connected between, themselves and with the corresponding outputs of the decoder of the counter readout state. The second terminals of the switching elements of all the keys belonging to the same group are interconnected, and from the point of their combination the signal of the sign of the group n is removed, indicating

that any key from this group is pressed.

The signal of pressing H is organized by collecting the signs of pressing all groups n, Djj,. . . the OR element, which is connected to the output of the device and to the second inputs of the AND elements, to the first inputs of which are connected the counter outputs. The outputs of the elements And are connected to the information inputs of the register.

When any key is pressed at the time a key is pressed, recording is enabled on the memory register (the state of the counter, which is the key pressed.

Lormula invention

An information input device comprising a register, a block of elements AND a counter, a decoder, an OR element and a keyboard, one terminals of which make contacts are connected to the outputs of the decoder, whose inputs are connected to the outputs of the counter and to the first inputs of the block of elements AND, characterized in that in order to increase the reliability of information input, other conclusions of the keyboard closing contacts are connected to the corresponding outputs of the device and to the inputs of the OR element, the output of which is connected to the second inputs of the block of AND elements and to one of the outputs s device, and outputs the AND unit connected to data inputs of the register.

Sources of information taken into account in the examination

1. Authors certificate of the USSR 531146, cl. G 06 F 3 / 02,1976.

2.Patent UK 140549 cl. G 06 F 3/02, published, 1975 (prototype).

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Claims (1)

Claim A device for inputting information containing a register, an AND block, a counter, a decoder, an OR element, and a keyboard, one of the closure contacts of which are connected to the decoder outputs, whose inputs are connected to the counter outputs and to the first inputs of the AND block, characterized by in order to increase the reliability of information input, other conclusions of the keyboard closing contacts are connected to the corresponding outputs of the device and to the inputs of the OR element, the output of which is connected to the second inputs of the AND block and to one of the outputs in the device, and the outputs of the AND unit connected to data inputs of the register.