SU736383A1 - Optronic pulse counter - Google Patents

Description

(54) OPTOELBKTRONIC COUNTER COUNTERS

one

The invention relates to computing and can be used in digital computing devices and visual indication devices.

A pulse counter is known that contains in each discharge a light source and a photo-receiving element.

Its disadvantage is the need for three-cycle power 1.

An optoelectronic pulse counter is also known, containing in each discharge a series-connected photodetector and a light source and an optically controlled current interrupter. The disadvantages of the known device are low noise immunity due to the electrical connection of the input and output circuits of the decade, the lack of technology due to the inhomogeneity of the element base, since the input delay lines are used, and limited functionality, since the counter consists of one decade 2.

The purpose of the invention is to improve the noise immunity, manufacturability

And enhanced functionality.

To achieve this goal, an optoelectronic pulse counter containing a series of similar types of decades, in each of the bits of which a photodetector and a light source are connected in series, a subsequent discharge photoreceiver is optically connected to a light source of the previous discharge, the power terminals of the bits of each decade are connected to the output of the chopper current, the electrical input of which is connected to the power bus, and the optical input is connected to the light source of the last discharge, in all decades except the first one, an input photodetector is introduced In addition, an additional light source is introduced in each decade, current interruptions and photo receivers of all bits except the first are made with two optical inputs, the input of the first photoreceiver and the second inputs of the photo receivers of the other bits and current interrupter are optically connected to the additional source

20 lights of its decade, one output of which is connected to the input pulse, and the other to the common bus, and in the first decade directly, and the rest through the input photoreceiver, which is optically connected to the light source of the last decade of the previous decade.

The drawing is a schematic diagram of the device.

It contains a series of similar types of decades, in each of the bits of which the photodetector 1 and source 2 of the circuit are connected in series, the photodetector of the discharge discharge is optically connected to the light source of the previous discharge, the power terminals of the discharge of each decade are connected to the output of the current interrupter 3, an electrical the input of which is connected to the power supply bus 4, and the optical input is connected to the light source 2 of the last bit, an input photodetector 5 is inserted in all decade except the first one, an additional light source 6 is inserted into each dead, Current collectors 3 and photo detectors 1 of all bits, except the first, are made with two optical inputs, input of photo sensor 1 nepBoiO discharge and second inputs of photo-detectors of the other bits and current breaker 3 are optically connected to an additional source of light b of its decade, one output which is connected to I1ine 7 input emulsions, and the other to the nebulae, G1richeL1 in the nerve decade — directly, and in the rest through the input photon receiver 5, which is optically connected to the light source 2 of the lower digit of the previous decade.

The device works as follows. Photodetectors have. 1 stable states: one is conductive, and the other is locked.

The transition from the locked state to the conductive state takes place when the optical inputs of the indicated light sources are supplied to the optical inputs. Photo detectors of all bits, except the first in each decade, are required to send two light signals simultaneously. Practically similar photodetectors can be overlaid by sequentially turning on two photographists, a photo thyristor and a phototransistor, etc.

The load of the photon receiver 1 is the corresponding sources of light 2. The imiums are calculated by input P1ine 7 simultaneously to all input sources 6 of light, however until the first decade of the counter is filled, the input source of light 6 of the first decade will emit light, since the other decade input sources are locked with the corresponding input photoniacamp 5.

For the counter to function normally, it is necessary that the duration of the input pulse lies within the following limits:

1b.MAX. 1t; 2tby mime

- the duration of the input pulse;

- maximum duration of switching from locked

In the conducting state of the photodetector;

TVKA.MIN. - the minimum duration of the switch from the locked to the conducting state of the photodetector.

If this condition is fulfilled, one photodetector will be triggered with each input pulse, with this, the corresponding light source begins to emit light, giving permission for the next bit to be triggered. As the input pulses arrive, the first decade of the counter is filled until its last discharge is triggered.

The last light source 2 of the first decade affects the optical input of the input photodetector of the second decade, which “transmits the subsequent pulse to the input source 6 of the light of the second decade, the first discharge of the second decade triggers. In addition, the last light source 2 of the first decade is optically connected to one input of the current chopper 3 of its decade, the second input of said current chopper 3 is optically connected to the input source 6 of light.

The current interrupter 3 is triggered when two light signals are present, i.e. the next time after the last discharge of the decade has been triggered by the input pulse, with this the purpose of the power supply of the first decade of the counter is broken, and it comes to its original state.

The breaker 3 of the current of the first decade and the input photodetector 5 of the second decade are also returned to the initial state. The process is repeated, the second decade of the second decade of the counter is processed, and so on. Similarly, all other decades of the counter work.

The proposed model has the following advantages: compared with the well-known:

- simplicity of construction and uniformity of the elements used, which makes it possible to easily implement this device according to the chip technology in a single technological cycle;

- the possibility of building counters with any base of a number system, for example, decimal, which will allow to present the final result in the customary decimal system;

- increased immunity due to arrangement of electrical connection of input and output circuits.

Claims (2)

1. Skarzhepa V. A. Pulse counters on thyristors. 1976, p. 90, fig. 31. 2. Japanese patent number 48-43470 cl. H 03 K 23/14, publ. 1973.