SU813397A1 - Data input device - Google Patents

Description

(54) DEVICE FOR INPUT OF INFORMATION

one

The invention relates to an organizational technique and can be used in typewriters or as keyboard contactless devices for entering information into a computer.

A device is known which consists of a k-lavature made as a set of cold cathode thyratrons connected to a control unit. When the control electrode is touched with a finger, additional capacitances are inserted between the grid anode and the grid of the cathode of the thyratron. The tanks, charging, give a current impulse to the control grid, a discharge occurs between the grid and the cathode, which is transferred to the anode. After the touch is removed from the key, the lamp goes out 1.

However, the use of such a device for inputting information in operational control systems is difficult because it does not memorize and display the typed information.

It is also known a device for inputting information, comprising a keyboard connected to an encoder connected to the receiving register, a trigger, one input of which is connected to the contacts of the keyboard, a matching circuit connected to the trigger output and a clock generator output, a threshold element and a delay line. When one of the keys is pressed, the normally closed contacts associated with it open, and through the coincidence circuit the start pulses pass to the encoder and through its output buses to the inputs of the triggers of the register of the computing device. The device is highly reliable and simple in construction 2.

However, the speed of this device is limited, which is important when using it in a computer and high-speed typewriters.

The purpose of the invention is to increase the speed and reliability of the input information.

This goal is achieved by the fact that a second counter, the input of which is connected to the output of the prohibition block, and the output, is entered into a device for entering information containing a keyboard, a group of elements I, the first counter, a clock generator, a block, a block of output keys and a trigger - to the block of output keys and with one of the inputs of elements AND of the group, a group of integrating amplifiers, one input of which is connected to the keyboard, the other inputs are connected to the clock pulse generator, and the outputs are connected to the second inputs of the elements AND group , and the OR element, the inputs of which are connected to the outputs of the AND group element, and the output is connected to the first counter and trigger.

The drawing shows a block diagram of the device.

The device contains a keyboard 1, a group of integrating amplifiers 2, a generator of 3 clock pulses, a group of elements AND 4, the first counter 5, the prohibition block 6, the second counter 7, the block 8 of output keys, the element OR 9 and the trigger 10.

The device works as follows.

The pulses from the generator of 3 clock pulses through the block 6 of the prohibition pass to the second counter 7. The counter goes through all the values of the codes. From the outputs of each bit of the second counter in the paraphase code, the information is fed to a group of elements AND 4. Each group of elements AND 4 each one of the inputs is connected to the outputs of a group of integrating amplifiers 2. Each code value corresponds to its own integrated amplifier. When the capacitive platform of the keyboard 1 is touched, the corresponding integrating amplifier is triggered, and at a certain code value of the second counter 7, corresponding to the triggered amplifier, the signal from the output of the AND 4 group of elements passes through the OR 9 element, sets and holds in the zero state trigger 10, from the output of which the signal goes to the prohibition block 6, stopping the generation from passing to the second counter 7. The counter stops, and the counter code through the output key block 8 goes to the output one device. At the moment when the touch pad is removed from the keyboard pad, bounce occurs at the top of the integrating amplifier, which appears at the output of the OR 9 element,

but the trigger 10 is not reset, since the first counter 5 is set to the zero state each time it is bouncing and does not have time to calculate the generation pulses. After a full touch from the capacitive platform of the keyboard 1, the first counter 5 completely calculates the generation pulses and the pulse from the output of the pulse counter resets the trigger 10 to the zero state, allowing the generation to pass through the prohibition block 6 to the second counter 7, closing the output keys 8.

This ensures reliable input of information into the computing device by eliminating bounce.

Claims (2)

1. USSR Author's Certificate No. 387355, cl. G 06 F 3/02, 1970. 2. USSR author's certificate No. 352269, cl. G 06 F 3/02, 1970 (prototype). Output