SU1042007A1 - Data input device - Google Patents

Description

The invention relates to computing and can be used to enter information into computers and other digital devices.

A device for entering information containing a keyboard is known.

connected to the inputs of the encoder, the outputs of which are connected to the informational inputs: the block of shift registers and the inputs of the OR element; the driver of single pulses, the output of which is connected to the control inputs of the shift register block Cl J The disadvantage of such a device is its low reliability.

The closest technically to the invention is a device for entering information containing 1 & key: a tour associated with the encoder inputs, the outputs of which are connected to the inputs of the block of shift registers and to the inputs of the OR element, the driver of single pulses, the output of which connected to the control inputs of the shift register block, a trigger, the first installation input of which is connected to the keyboard output, the second installation input to the output of the OR element, and the trigger output connected to the input of a singleformer impulses {2.

A disadvantage of this device is low reliability.

The purpose of the invention is to increase the reliability of the device.

The goal is achieved by the fact that the input device contains a keyboard, the outputs from the first to the tenth of which are connected to the corresponding inputs of the encoder, the outputs of which are connected to the corresponding inputs of the block of shift registers and the first element OR, the output of which is connected to the installation input trigger / first and eleventh keyboard outputs are connected to another input of the first OR element and to the installation input into a trigger unit, the output of which is connected to the input of a single pulse former, the element is And, the second element OR., two groups of elements 5И-OR; the first and second elements 6Y-OR and the element 8I-OR, keyboard outputs: first, third, fifth, seventh, ninth, outputs: first, second, fifth, sixth, ninth, tenth, outputs: first through eighth connected to the corresponding inputs of the first group of elements 5I-OR, the first and second elements of BI-OR, and elements 8I-OR, respectively, whose outputs are connected to sorting inputs of the second element OR whose output is the output bus of the device and connected to the first input of the AND element, the second the input of which is connected to the output of the Formirov ate a single pulse, and the output - to the other input of the shift register unit outputs are connected to inputs of the encoder element groups 5 AND-OR, the first and second members, 6I and 8I-OR-OR element respectively.

On. The drawing shows the device.

The device contains a keyboard 1, encoder 2, block 3 shift. Registers the first and second elements OR 4, 5, shaper b single pulses, trigger 7, element AND 8, element 5И-OR 9, first and second elements 6И-OR 10, 11 , element 8ILI 12, - output bus 13.

The device works as follows.

In the initial state at the output. of the element OR 4, a potential is formed that holds trigger 7 in the state O. The input number is dialed by pressing € M.; on the keyboard keys 1; starting with the older digit of the number.

When you press any of the keyboard 1 keys (the first keyboard output is a key. Oh, the second keyboard output is a key, etc., the tenth keyboard output is the keyboard key 9, the normally-closed contacts are opened. And the normally-open contacts are closed. B the opening moment of the normally closed keyboard contacts at the output of the encoder 2 signals appear in accordance with the digit code of the pressed key, fed to the input of the block 3 shifting reg; the elements of the OR 4 and the elements 5И-OR 9, bi-OR 10, 11, 8 AND-OR 12. Potential, holding the trigger in the state Oh, disappears from the output of the element OR 4..

At the moment of closing the normally open contacts of the keyboard i, a signal is generated at the control output that sets the trigger 7 in the unit state. The shaper of single pulses produces a single pulse when the trigger transitions from the state O c. This pulse arrives at the control input of the 3 shift register unit through the I8 element if there is no signal from the output of the OR 5 element. This single pulse arrives at the control input of the 3 shift register unit and the number code from the output of the encoder 2 is written to the high register bit The signal at the output of the element OR 5 is shown in the event that at the same time a signal occurs at two or more keyboard outputs (even with a short time press of two keys. This signal prohibits the recording of information in the memory and signals the Sh1 bus

Claims (1)

A DEVICE FOR INFORMATION INPUT, containing a keyboard, the first to tenth outputs of which are connected to the corresponding inputs of the encoder, the outputs of which are connected to the corresponding inputs of the shift register block and the first OR element: whose output is connected to the zero setting of the trigger, the first and eleventh keyboard outputs connected to another input of the first OR element and to the installation input in a trigger unit, the output of which is connected to the input of a single driver - "pulse, different; the fact that, in order to increase the reliability of the device, an AND element, a second OR element, two groups of 5I-OR elements, the first and second · 6I-OR elements and 8I-OR element, keyboard outputs are inserted into it; first, third, fifth, seventh, ninth, outputs: first, second, fifth, sixth, ninth, tenth, outputs: first through eighth are connected to the corresponding inputs of the first group of 5I-OR elements, the first and second 6I-OR elements, and element 8I-OR, respectively, the outputs of which are connected to the corresponding inputs of the second element OR, the output of which is the output bus of the device and connected to the first input of the element And, the second input of which is connected to the output of the single pulse shaper, and the output to the other input of the shear reg strov, the encoder outputs are connected to the inputs of the second group of elements 5I-. OR, first and second BI-YLE elements and 8I-YLE element, respectively. . 1042007