SU1285524A2 - Indication storage element - Google Patents

Abstract

The invention relates to a pulse technique and can be used in the construction of digital computers and automation devices. The purpose of the invention is the expansion of functional capabilities achieved by the fact that the display element with a memory containing a transistor 1, photodiodes 2-4, power supply bus 5, diodes 6-11, rtodody 10, 14, resistors 12 and 13, information BUS 15 and 16 and optical outputs 17 and 18, additionally photodiodes 7 and 9 and new functional connections between the circuit elements. The display element with memory functions as a synchronized D-trigger. 1 il. Additional to auth. St. № 1133616.

Description

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The invention relates to a pulse technique and can be used in the construction of digital computer devices and automation devices.

The aim of the invention is to expand the functionality of the device by performing the function of a D-flip-flop,

The drawing shows a diagram of a display element with a memory.

The device contains a transistor 1, the base of which is through the first photodiode

2 and a parallel chain connected in series of the second

3 and the third 4 photodiodes are connected to the power supply bus 5 and through the oppositely connected first diode 6 and a quarter photodiode 7 to the common bus 8, the fifth photodiode 9 is connected between the bus 5 pi

Tanya and the common point of the counter-switched on the first diode 6 and the fourth photodiode 7, the first LED 10 and the second diode 11 connected to the collector of transistor 1, the second diode 11 connected by anodes through the first 12 and second 13 resistors with the power supply bus 5, the anode of the second LED 14 connected to the anode of the second diode 11, and the cathode is connected together with the emitter of the transistor 1. With a common bus 8. The information bus 15 is optically connected to the optical inputs of the third 4 and fifth 9 photodiodes, and the information bus 16 is optically connected to the optical inputs of the second 3 and four pty 7 photodiodes. The optical output 17 of the first LED 10 is optically coupled to the optical input of the first photodiode 2, being simultaneously the direct optical output B of the trigger, the optical output 18 of the second LED 14 is the inverse optical output of the B flip-flop.

The first LED 10 and its optical outputs 17 are realized as one LED and a fiber-optic collector with one optical input and two optical outputs, or as two series-connected diode light each with one optical channel.

Resistors 12 and 13 are selected from the following relationship:

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R, 2

E-1 2 1 1-V11 ..

R

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 E - UF2. t

-Fa

E - ike - Ua

R

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where Uy is the collector-emitter voltage of an open transistor; R is the value of the first resistor 12;

 - the value of the second resistor 13, UFI Uf2, the ignition voltage of the first 10 and second 14 LEDs, respectively 1p, 1p2, the current of the first 10 and second 14 LEDs, respectively Ug - direct voltage drop

the second diode 11;

- -kmais maximum permissible current values of the transistor 1. The memory display element works as follows.

Let the transistor 1 be closed, then the second diode 1 1 through the counter-switched on and the first LED 10 does not flow (the second diode 11 is locked). The current flows through the chain; the second resistor 13 is the second LED 14. If the information signal I) 1 appears during the absence of the sync signal, then the third 4 and fifth 9 photodiodes appear in the excited state, which, however, does not cause The excitation of the transistor 1, since the photodiode 3 in the chain of photodiode 4 does not excite the second photodiode 3, and in the chain of the fifth photodiode 9 of the first diode b, the reverse voltage is applied to the last diode, making it impossible to turn on transistor 1.

With the arrival of a clock signal, i.e. D 1, C 1, Q O, the photodiode 3 turns on to the excited state, photodiode 4 closes, and the photodiode 9 closes, photodiode 7, the first diode 6 turns out to be locked to the base of the transistor 1, the photodiode 4, the transistor starts to flow 1 opens and a current Ij begins to flow through it. If 1 becomes greater than SFI (the ignition current of the first LED), the first LED 10 starts to ignite and, accordingly, the first photodiode 2 becomes energized, photocurrent starts to flow through it, the transistor opens even more, the current of the first LED 10 increases, which leads to even more arousal first

photodiode 2. Such an avalanche-like process leads to switching on the first LED 10. When the voltage becomes Ug Ugpp, then the second LED 14 is switched off (the voltage of the open transistor is 0.1-0.4 V, the voltage Ug is direct 0, 4-0.6 V, voltage 1.1-3 c). The first LED 10 turned on means recorded in the trigger 1. After the termination of the clock signal C O, the excited state is maintained by positive feedback. The first LED 10 is the first photo diode 2.

Display element with memory by aut. St. No. 1133616, characterized in that, in order to expand the functionality due to the implementation of the D-trigger functions, the fourth and fifth photodiodes are introduced into it, with a quarter of the photodiode connected between the second cathode

If, С 1, then the second 3 and the fourth 7 photodiodes go into the excited state, and the inclusion

the latter leads to the transfer to the pro-20. photodiode and the power bus, the fifth power condition of the first diode 6, the LED is connected between the third cathode, if a trigger (I have a unit recorded, the photodiode and the cytobus, except

then the photocurrent of the first photodiode 2 com-this, between the cathode of the third photo

retired by the current of the first diode circuit and the base of the transistor included

Od 6 is the fourth photodiode 7, and a transistor diode.

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zistor 1 is locked. If transistor 1 is locked, this state is confirmed and O is written to the trigger, i.e. in the excited state is the second LED 14.

Thus, this device functions as a synchronized D-trigger.

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Claims (1)

Invention Formula Display element with memory by aut. St. No. 1133616, characterized in that, in order to expand the functionality due to the implementation of the D-trigger functions, the fourth and fifth photodiodes are introduced into it, with a quarter of the photodiode connected between the second cathode