SU723558A1 - Information input arrangement - Google Patents

Description

Izofethening refers to the car and computer hardware and to be used in keypads of various systems and information input devices. Information input devices are known that contain keys, key sensors, memory blocks of codes, analyzers and logic elements AND, NOT, providing protection against chatter and improper key presses. The disadvantage of these devices is their relative complexity ... The closest technical solution The invention is a device for entering information containing a serially connected keyboard, an encoder and a register, an OR element, whose inputs are connected to the output of the encoder, the first output to the first ode element and the second output - to a delay element whose output is connected to the second input of the AND gate, whose output is connected to register 2}. The disadvantage of this device is its complexity. The aim of the invention is to simplify the device. This is achieved by the fact that the device contains a series-connected adder and a threshold element, the output of which is connected to the third input of the element I, the input of the adder is connected to the keyboard. The drawing shows a block diagram of the device. The device contains a keyboard 1, encoder 2, register 3, eg.Amect OR 4, e; delay 5, adder 6, threshold element 7, and element 8. The device operates as follows. When pressed correctly, the keypad of the keyboard 1 at the output of the encoder 2 generates a code corresponding to this key, and through the element OR 4 the signal is fed to one input of the element AND 8 through intermediary, and to the other in this

e; omenta through the delay 5. At the same time, the signal from the specified keypad is fed to the input of the adder 6, and from the output of the latter to the input of the threshold element MsHTa 7. Threshold element 7 does not work, because the input signal to its input is less than its trigger threshold. Permitting from the output of the specified element is fed to the corresponding input of the element And 8. The signal from the output of this element permits, through the time set by the delay element 5, to write information to the register 3

When two or more keys are simultaneously turned on, signals from corresponding keys arrive at the input of adder 6a, which leads to the output of the last signal from which threshold element 7 is generated. From the output of threshold element 7, the inhibit signal arrives at the corresponding input of element 8.

Writing information to register 3 in this case is block.

formula of invention

A device for inputting information containing successively connected keyboard, encoder and register, Element OR, the inputs of which are connected to the output of the encoder, the first output - to the first input of the AND element, second, output of the delay element, whose output is connected to the second input of the And And the output of with a register different from IBM that, in order to simplify the device, it contains a series-connected adder and a threshold element, the output of which is connected to the third input of the AND element, the input of the adder is connected to the key re.

Sources of information (Madia, taken into account for your expertise

1, Authors of USSR certificate, N9 556427, cl. G About F 3/02, 1976.

2. US patent M 3978474, class, G About F 3/02, 1976 (phototype).

.

L

Claims (1)

Claim A device for inputting information comprising a keyboard, an encoder and a register connected in series, an OR element whose inputs are connected to the output of the encoder, a first output to the first input of the And element, and a second output to the delay element whose output is connected to the second input of the And element, the output of which connected to the register, characterized in that, in order to simplify the device, it contains a series-connected adder and a threshold element, the output of which is connected to the third input of the element And, the input of the adder is connected to the keyboard.