SU760136A1 - Graphic information readout device - Google Patents

Description

The invention relates to the field of automation and computing, in particular to devices for reading graphic information.

A device for reading 5 graphic information is known, which contains a recording medium made in the form of a conductive medium, contact buses connected to the 'keys connected to the switch, and a readout · ’element M ·

Nedbstatok it consists in low speed.

Another device is known for 11 'reading out graphic information; containing a tablet made in. as a conductive medium with contact tires connected to the outputs of the keys, the inputs of which are connected to the switch 21, the puller coordinates connected to the zero-body pulse generators connected to reversible counters [2].

Such a device is closest to the described technical solution.

However, it does not possess enough

high speed ..

The purpose of the invented ^ is to increase the speed of the device. 3 <

2

This goal is achieved by the fact that the device contains digital-to-analog converters connected to reversible counters and keys, and And elements, the inputs of which are connected to the null organ and the switch, and the outputs are connected to the corresponding reversible counters.

The drawing shows the block diagram of the device.

The device contains a tablet 1, made in the form of a conductive medium with contact tires, keys 2-5, switch 6, coordinate remover, 7, null organ 8 and voltage sources 9 and 10, made in the form of digital-analog converters 11, reversible counters 12, And 13 elements , 14 and generators 15 pulses.

The device works as follows.

In the process of moving the remover of coordinates 7, the zero-body 8 sends a signal about the voltage deviation from the zero potential. Depending on the sign of the deviation, the signal from the output of the null organ 8 is fed to the first output of one of the elements I 13, 14, the outputs of which control the addition or subtraction of pulses coming from

760136

generator 15 in the counter 12. And since the second inputs of the elements 13, 14 are combined and connected to the corresponding output of the switch 6, depending on the state of the potentials, the output voltage of one of the analog-to-analog converters 11 varies between its outputs zero-body does not form a zero difference by Potentials. Coordinate values are read from digital outputs of reversible meters.

The advantage of the proposed device is that when using switch 6 and keys 2,

3 (4, 5), voltage sources are alternately connected to the coordinate buses, the voltage difference applied to the inputs of the coordinate remover 7 is so small that it takes on a steady-state value almost instantly.

Introduction of a new unit and elements, and also new constructive connections

15

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Claims (1)

Claim ten A device for reading graphic information containing a planet made in the form of a conductive medium e by contact tires connected to the outputs of keys whose inputs are connected to a switch, a coordinate remover connected to a null organ, pulse generators connected to reversible counters And what about her with that, In order to improve the speed of the device, it contains digital-to-analogue converters connected by e / reversible counters and keys, and AND elements whose inputs are connected to the null organ and the switch, and the outputs are connected to the corresponding reversible counters.