SU403066A1 - ELECTRICAL INFORMATION CONVERTER TO ELECTRIC SIGNAL - Google Patents

Description

one

The invention refers to the field of technical physics, in particular to photoelectric converters.

A known converter of light information into an electrical signal containing n blocks of photodiode cells, each of which is connected to a switch, and a discriminator.

However, the known Converter has a lack of reliability.

In order to increase reliability and expand the functionality of the proposed converter, the output of each of the n photodiode cell blocks through an amplifier and memory unit, to the input of which a clock pulse generator is connected through a key, is connected to one of two adders, which connects the key is connected to the clock pulse generator, while the outputs of the adders are connected to the inputs of the discriminators. In addition, each switch consists of a sawtooth generator, one of the inputs of which is connected to the lower voltage level setting unit of the output voltage, and the output of the saw voltage generator is connected to its input through a feedback circuit consisting of a series-connected installation unit top level output voltage, trigger and

key, the second v.hod which is connected with a generator of trigger pulses.

FIG. 1 is a block diagram of the proposed converter; in fig. 2 is a circuit diagram of a photodiode cell unit.

The described converter contains n blocks of 1-4 LED cells connected to the corresponding switches 5-8. The switchboards include generators 9–12 of the sawtooth voltage, keys 13–16, triggers 17–20, blocks 21–24 of the upper level setting of the output voltage, and blocks 25–28 of the lower level setting of the output voltage. The outputs of the LED cell blocks are connected respectively to the amplifiers 29-32, from the outputs of the latter signals are sent to the memory blocks 33-36, to which the keys 37-40 are also connected, to the corresponding inputs of the adders 41, 42. To the inputs of the keys 37-40 and the key 43 connected generator 44 trigger pulses. The outputs of the adders are connected to the discriminator 45.

The photodiode cell unit consists of cells 46-48 and two oppositely connected photodiodes 45 and 49. Each cell is connected to the corresponding divider point, consisting of resistors 51-54. The block of photodiode cells is connected to the rest of the converter elements via inductance (transformer) 55.

The Converter operates as follows.

In the initial position, the triggers are in the state "1, the keys 13-16 are saturated, and the voltage at the outputs of the saw-tooth voltage generators is equal to the lower level. With the arrival of a series of input pulses, the flip-flops are transferred to the "O" state; voltages are applied to the outputs of the saw-tooth generators, which are applied to the photodiode cells.

When this voltage changes, a sequential interrogation of cells occurs, i.e., the voltage-current characteristic of the cell is such that the current passing through the cell is approximately constant at any voltage across the cell, not equal to zero. The magnitude of the current is proportional to the illumination of the cell. With a voltage across the cell equal to the bullet, a current surge occurs, and it changes its direction to the opposite.

In this case, a signal proportional to the illumination is released on the cell inductance.

The interrogation voltage of the cells is set using a resistive divider. The signal from the outputs of the cells is amplified by amplifiers and the memory blocks arrive at the PA, since at this time the keys 37-40 are closed, and the input resistances of the adders are large. The pulse trigger generator produces a series of pulses that are shifted in time relative to the input pulses. During the period of action of these pulses, keys 37–40, 43 pass up, and the voltages from the memory units are summed in accumulators. Depending on the magnitude and sign of the difference of the signals on the outputs of the adders, a signal appears at one or another output of the discriminator.

When the sawtooth voltage at the outputs of the generators has a certain amplitude equal to the voltages of the upper output voltage level blocks, the triggers are transferred and the sawtooth voltage generation is stopped. With the arrival of a new input pulse, the process repeats.

Subject invention

Claims (2)

1. A converter of light information into an electrical signal containing n blocks of photodiode cells, each of which is connected to a corresponding switch, and a discriminator, characterized in that, in order to increase reliability of operation, the output of each of the n blocks of photodiode cells through an amplifier and memory unit, to the input of which a clock pulse generator is connected via a key, connected to one of two adders, the control inputs of which are also connected via a key to a clock pulse generator, while the outputs of the accumulators with one with inputs discriminators. 2. The converter according to claim 1, characterized in that, in order to extend the functionality of the converter, each of the switches consists of a sawtooth generator, one of the inputs of which is connected to the lower voltage level setting unit, and the output of the sawtooth voltage generator connected to its input through a feedback circuit consisting of a series-connected unit for setting the upper level of the output voltage, a trigger and a key, the second input of which is connected to the generator pulses. u R -h ,, fc. / 7 Mr. / J  I L I f I I 26 i..rrd. I JL111ZH 11T // j /five 27M  np. 24 T320 / 2 h-rf d / b WITH 2ff 1G17G1GG1; 4G f // 2 L htri LH Uj nhj-riiftl II-, I s raJ No 4: G r 42 H52 ./