SU894697A1 - Information input device - Google Patents

Description

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This invention relates to automata. ke and computer technology and can be used to build data preparation devices.

Known devices for entering information f 1}.

However, such devices are complex and have a low data entry rate.

Closest to the present invention is an information input device containing groups of switching elements, a switch, a first counter, an And element, a second counter, and a decoder.

The known device operates as follows.

In the initial state, all switching elements are disconnected, the potential / coming from the inverse output of the switch to the input of the element AND is resolving, and the clock pulses through the element AND are fed to the counting input of the first counter. The counters consistently change their position according to the signals received from their counting inputs. When the switching element is turned on in one of the groups during the coincidence of the state of the second counter with the group code,

the element is switched on, the signal from the corresponding output of the decoder enters the corresponding information input of the switch, as the counter continues to count if its state coincides with the code of the switching element of the corresponding group. A potential is generated on the switch output, and the potential from the inverse the switch output blocks the arrival of clock pulses through the AND element at the input of the first counter. As a result, after the left and 5, no output of the potentiometer key is pressed.

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Shiak device generated code corresponding to the code included in the MyTaiyioHHoro com element of the corresponding group 2.

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However, in the known device, the generation of the output code takes a long time due to the alternate filling of the counters. At 25, when simultaneously and simultaneously switching two or more switching elements, the device generates the code of that element, the group code of which earlier than the others coincides with the state of the second counter, which can lead to

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generating the output code of the switching element erroneously turned on. In addition, when two or more switching elements of the same group are turned on, the output code will be distorted, since the AND element is blocked only by the potential from the inverse output of the switch, which switches only when comparing information on the current and information inputs.

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

The goal is achieved by the fact that the device has a second switch, a comparison circuit and an AND element, and one input of the second switch is connected to other keyboard outputs, the third output of which is connected to the input of the comparison circuit, the output of which is connected to the third input of the first counter, the first input of the AND element and the third input of the second counter, the first input of which is connected to the first, the output of the second switch, the other inputs of which are connected to the outputs of the second counter and other outputs of the device, and the second output is co the second input element And, the third input of which is connected to the second output of the first switch, and the output to the third output of the device.

Optocouplers are inserted into the keyboard of the device, with the input of each optocoupler connected to the corresponding vertical keyboard bus, the first output of each optocoupler connected to the input of the comparison circuit, and the second output with one output of the keyboard.

Fig. 1 is a diagram of the proposed device for inputting information; Fig. 2 is a keyboard diagram.

The device contains a keyboard 1, the first 2 and second 3 counters, the first switch 4, the second switch 5, the comparison circuit B, AND 7.

Keyboard diagram 1 contains optocouplers 8, groups of switching elements 9, the inputs of which are combined within the kaida group and connected via resistors 10 to the zero potential bus, and the outputs of the corresponding switching elements are combined and connected through the optocouplers 8 to the information inputs of the first switch 4, the other outputs of the optocouplers are combined and are connected to the input of the comparison circuit 6.

The output of the keyboard 1 is connected to the input of the comparison circuit 6, the output of which is connected to the reset inputs of the per-. 2 and the second 3 counters and the first input element And 7. The outputs of the keyboard 1 are connected to the information inputs of the switch 4 and the information inputs of the second switch 5. The first inverse outputs of the switches 4 and 5 are connected to the first inputs of the corresponding counters 2 and 3, the second inputs which are connected to the clock bus. The second outputs of the switches 4 and 5 are connected to the corresponding second and third inputs of the element And 7. The outputs of the counters 2 and 3 are the output buses of the device and are connected to the address inputs of the corresponding switches 4 and 5. The device operates as follows.

When the switching elements 9 of the keyboard 1 are open, the comparison circuit 6 generates a signal that holds the counters 2 and 3 in the zero state.

When one switching element 9 of the keyboard 1 is closed, a single signal appears on one of the information inputs of the switches 4 and 5, and an electric current flows through the comparison circuit B, whereby the comparison circuit 6 removes the blocking signal and the counters 2 and 3 begin to fill in parallel until the inverse outputs of switches 4 and 5 to one of the inputs of counters 2 and 3 do not come forbidding potential. The unit potentials from the direct lines of switches 4 and 5 together with the resolution signal from the comparison circuit form a potential at the output of the element. And the key is pressed, which carries information that the code of the switching element of the switching element is generated on the output buses of the device.

The immunity of the device to the bounce of the switching elements is ensured by the choice of the clock frequency and the fact that during bounce the signal from the output of the comparison circuit b sets the counters 2 and 3 to the zero state.

With the closure of two or more switching elements, an electric current flows through the comparison circuit b more than with the closure of one colmutation element. In this case, the comparison circuit 6 generates a blocking signal which keeps the counters 2 and 3 in the initial state.

Thus, the proposed device allows you to block the entry of information from the simultaneous closure of several switching elements, to increase the speed of information input and reliability of operation.

Claims (2)

1. A device for entering information containing a keyboard, first and second counters, the first switch. moreover, one keyboard output is connected to one input of the first switch, the first output of which is connected to the first input of the first counter, the second input of which is connected to the second input of the second counter and to the device input, and the outputs to other inputs of the first switch and one output of the device, characterized in that, in order to increase the speed and reliability of the device, a second switch, a comparison circuit and an element are introduced into it, and one input of the second switch is connected to other keyboard outputs, the third the output of which is connected to the input of the comparison circuit, the output of which is connected to the third input of the first counter, the first input of the AND element and the third input of the second counter, the first input of which is connected to the first output of the second switch, the other inputs of which are connected to the outputs of the second counter and other outputs of the device, and the second output with the second input of the element I, the third INPUT of which is connected to the second output of the first switch, and the output with the third output of the device. 2; The device according to claim 1, so that, in the keyboard: entered optocouplers, and the input of each optocoupler is connected to the corresponding vertical bus keyboard, 0: The first output of each optocoupler is connected to the input of the comparison circuit, and the second output is connected to one output of the keyboard. five  Sources of information taken into account in the examination 1. USSR author's certificate cf 6.38949, cl. G 06 F 3/02, 1977. 2. USSR author's certificate 0 634261, cl. G 06 F 3/02, 1977 (prototype). Taktova Shino J7t eight M  I Z-jJIZ-ZI. ten -syn Ji i g t g fO - sleep