SU1300516A1 - Device for reading graphic information - Google Patents

Abstract

The invention relates to automation, in particular, to devices for converting optical information into electrical signals. The invention makes it possible to increase the reliability of the device by excluding the second key for each tire 1, while not impairing the accuracy of the formation. 1 ° Il. about: l

Description

The invention relates to automation and computing, in particular to devices for reading graphic information of a matrix type.

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

The drawing shows a block diagram of the proposed device.

The circuit includes a matrix 1 of photosensitive elements 2, an output driver 3, a first group of keys 4, a first register 5, a second group of keys 6, a second register 7s first 8 and second 9 amplifiers, a voltage divider 10, and a current-to-voltage converter 11.

The device works as follows.

Registers 5 and 7, respectively, of the vertical and horizontal scans include keys 4 and 6 of the polled vertical and horizontal tires in the first positions (I), and keys of the unsolicited vertical and horizontal tires in the second positions (II) (the case is shown when the photosensitive element is polled included between the first horizontal and first vertical tires). Thus, the interrogated element is connected in series through the converter 11, between the output of the amplifier 9 and the driver 3, on which the device relies on reliability of the device, rum exerts an output voltage, it contains a converter current — caused by the current through the interrogation voltage whose input is connected to

the output of the second amplifier, and the output is connected ft to other inputs of the keys.

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The divider 10 reduces the voltage of the negative reverse, 40 of the first group and to the control input.

which is fed to the amplifier 8. This takes into account the division of the output voltage by the divider consisting of the resistance of the key of the corresponding vertical bus and the resistance of the load of the driver 3,

Converter 11 is connected to the feedback circuit of amplifier 9 and the second amplifier, and a voltage divider whose input is connected to the outputs of the corresponding keys of the first group, and the output is connected to the control 45 input of the first amplifier, the signal input of which is connected to the output of the output signal generator .

The function of converting the magnitude of the flowing current into a voltage. The conversion factor of converter 11 is selected such that the voltage does not change when the current through the corresponding switch changes.

Invention Formula

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A device for reading graphic information containing a matrix of photosensitive elements, each horizontal bus of which is connected to the signal input of the corresponding key of the first group, and each vertical bus is connected to the signal input of the corresponding key of the second group, the first and second registers whose inputs are first and the second inputs of the device, and the outputs are connected to the control inputs of the keys of the first and second groups, respectively, the driver of the output signal, the input of which is connected to one It outputs the keys of the second group, and the output is the output of the device, the first signal amplifier, the output of which is connected to the other outputs of the keys of the second group, the second signal amplifier, one input of which is connected to the corresponding outputs of the keys of the first group, characterized in that tse0

the second amplifier, and the voltage divider, the input of which is connected to the outputs of the corresponding keys of the first group, and the output is connected to the control input of the first amplifier, the signal input of which is connected to the output of the output driver.

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Compiled by A. Romanov Editor M, Kelemesh Tehred I. Popovich Corrector M. Pojo

Order 1152/50 Circulation 673 Subscription

VNIIPI USSR State Committee

for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5

Production and printing company, Uzhgorod, st. Project, 4

Claims (1)

A device for reading graphic information containing a matrix of photosensitive elements, each horizontal bus of which 15 is connected to the signal input of the corresponding key of the first group, and each vertical bus is connected to the signal input of the corresponding key of the second group, the first and second registers, the inputs of which are the first and second the device inputs, and the outputs are connected to the control inputs of the keys of the first and second groups, respectively, the output driver, the input of which is connected to one m outputs of the keys of the second group, and the output is the output of the device, the first signal amplifier, the output of which is connected to other outputs of the keys of the second group, the second signal amplifier, one input of which is connected to the corresponding outputs of the keys of the first group, characterized in that, for to increase the reliability of the device, it contains a current-voltage converter, the input of which is connected to the output of the second amplifier, and the output is connected to other inputs of the keys of the first group and to the control input of the second amplifier, and a divider zheniya whose input is connected to the respective outputs of the first group of keys, and an output connected to upravlya45 yuschemu input of the first amplifier signal input coupled to the output of the output signals.