SU1621144A1 - Optronic pulser - Google Patents

Abstract

The invention relates to a pulse technique, can be used in optoelectronic circuits of automation and computing as a generator, memory element, light indication element. The aim of the invention is to reduce power consumption, increase stability and noise immunity. An optoelectronic pulse generator contains a common bus and a power bus, which are connected via parallel-connected voltage dividers, formed in pairs by a load I-diode 1 and I-diode 2. Photodetectors 3 and 4, electro-optical gates 5 and 6, 7 and 8. The generator also contains current limiting resistor 9, galvanic input 10, electrical output 11, a constant light emitter 12, made on a light emitting diode, mounting 13 and resetting 14 inputs, current limiting resistors 15 and 16, LEDs 17 and 18, optical inputs 19 and 20, direct and inverse optical outputs 21 and 22, respectively. 2 Il. ate with 16 g-CZbZJ / 4 W o N) Ј

Description

The invention relates to a pulse technique, can be used in optoelectronic circuits of automation and computing technology as a generator, memory element, light indication,

The aim of the invention is to reduce power consumption, increase stability, noise immunity.

Fig. 1 is a schematic diagram of an opto-electrical device; figure 2 - volt-ampere characteristic (VAC) and the corresponding load curves for the A-diode.

The device consists of a common bus and a power bus, which are connected through parallel-connected voltage dividers, formed in pairs by a load A-diode 1 and A-diode 2, photodetectors 3 and 4, electro-optical gates 5 and 6, 7 and 8. Average points These dividers are connected to the output bus and connected via a current resistor 9 with a galvanic input 10 and directly with the electrical output 11 of the device. The device also contains a constant light emitter 12, made, for example, on a LED. In addition, the device has installation and pre-installation inputs 13 (R) and 14 (S), electrically developed from the A diode 2 and the electrical output 11 due to the corresponding connection of the input 13 (14) through a series-connected current limiting resistor 15 (16 ) and the LED 17 (18) with a common bus and the optical connection of the light output of the LED 17 (18) through the LED of the electric shutter 7 (8) with the light input of the photodetector 4 (3). The output aperture of the electro-optical shutter 7 (8) is made in the form of an adder of light fluxes from the LED 17 (18) and the corresponding installation (reset) optical input 19 (20) of the device. From the direct flow of the constant emitter 12, the light is directed through the light-guides of the electro-optical gates 5 and 6 to the direct and inverse optical outputs 21 (Q) and 22 (Q). To ensure device operation, A-diodes are of the same type.

The device works as follows

During operation, binary signals are received either at the galvanic input 10, or at the electrical R and S inputs 13. 14, or directly at the optical R and S inputs 19 and 20 (figure 1). In relation to the galvanic input 10, the device operates as a memory cell. When the voltage at the galvanic input 10 is below zero

Electrical output 11 appears O, as the voltage at input 10 rises above the supply voltage, 1 appears. When a signal is found on a galvanic

the input 10 between the indicated levels at the electrical output 11 is saved a logical signal due to the last previous input signal, which went beyond the specified range to one or another

the side.

When 1 is applied either to the electric R (G) input 13 (14), or to the optical R (S) Bxofl 19 (20), the electric output 11 is set to O (1). When this works

electro optical shutters 5 (6), which ensures the formation of a correspondingly zero (single) light signal at the forward (inverse) optical output 21 (22).

When two signals 1 are simultaneously applied to the inputs 13, 14, the device switches to the generation mode, the period of which is caused by the time delays in the operation of the electro-optical valves 7 and

8 photodetectors 3 and 4. At the initial moment of time, the electro-optical shutter 7 is closed and the shutter 8 is open. The light passes to the photodetector 3, its conductivity increases, the total load curve 23

(A-diode 1 and photodetector 3) is moved to the upper position relative to the total IVC of $ 24. -diode 2 and photodetector 4), the device switches to state 1 (Fig. 2). Electro-optical shutter

7 opens, the shutter 8 closes, the light stops flowing to the photodetector 3 and begins to flow to the receiving receiver 4. The conductivity of the photoreceiver 3 decreases and the total curve 23 (A-diode 1 and

photodetector 3) moves to the lower position, at the same time, the light falling on the photodetector 4 increases its conductivity and the total load curve 2 (A-diode 2 and photo-receiver 4) moves

in the upper position relative to the total IVC 23 (A-diode 1 and photodetector 3). The device switches to state O. Next, the switching process is repeated. Respectively with the logic signal of the electrical output 11, the signal at the forward optical output 21 changes, and at the inverse optical output, the signal changes in antiphase. In counting trigger mode on optical

5 inputs R (S) 19 (20) or to the electric inputs 13 (14) it is necessary to apply short pulses with a duration at which the cell was switched from one state to another, taking into account the real

delays and their scatter. The duration of these pulses should be limited to a maximum duration so that there is no generation mode and a false reset to the initial state. The period of these pulses should be longer than the maximum time for establishing new states of electro-optical gates, only after which the next counting pulse can be applied.

The device may have additional optical inputs R (S) and directly connected to photodetectors 3 and 4, which allows switching the device without analyzing the state of the gates associated with the previous state of the device itself, which expands the range of use.

Compared with the prototype, the device has the following advantages: the power consumption is significantly reduced, the hook as the operating point in both stable conditions is selected in places with the lowest current consumption: due to the fact that the steady state points are on the steep slopes of the current – voltage characteristics; While the photoacceptors have dark resistances themselves are large, the photoresistance changes are less affected by the n-and instability of the output logic levels O and 1, along with low power consumption, while reducing the requirement for boron photoconductors, and the requirements to scatter photodetectors parameters of one type; noise immunity of the device is increased, since the operating point is approximately at zero and in Epit.

Claims (1)

Invention Formula Optoelectronic pulse generator containing serially connected and connected between the bus power supply and common bus first and second photodetectors, current-limiting resistor, one output of which is connected to the input bus, the first Y-diode, 5 connected between the generator output and the common bus, direct and inverse optical inputs, the first and second LEDs the anode of the second LED connected to the common bus, the first input and output optoelectronic gates between the power bus and the output bus, the second input and output optoelectronic gates between the output bus and the common bus, the anode of the second LED is connected to the common bus The first and second LEDs of the first and second LEDs are connected via the corresponding resistors to the direct and inverse electrical inputs, the direct optical input and the light output of the first LED are optically connected through the aperture of the optical optoelectron gate with the optical input of the second photodetector, the inverse optical input and the light the output of the second LED is optically coupled through the aperture 5 of the second optoelectronic gate with the optical input of the first photodetector; the light output of the constant light emitter is connected through the apertures of the first and second output optoelectronic gates with the direct and inverse optical outputs, the second output of the current limiting resistor, the connection points of the first and second photodetectors, the output of the first D-diode connected to the output of the generator, about tl and h e 5 th and so that, in order to reduce power consumption, increase noise immunity, a second I-diode is introduced, connected in series with the first I-diode and connected between the bus bus and the output of the device. 24 / 23 I X 24 24 FIG. 2 IT