SU1374268A1 - Data transmitting and receiving apparatus - Google Patents

Abstract

The invention relates to information systems and can be used in the construction of information control systems, automated process control systems and computing systems. The aim of the invention is to increase the reliability of the reception of information. The device contains on the transmitting side the first driver 1 of the compensating pulse, the transmitter 2 of the code feature zero, the transmitter 3 of the code indication of the unit, the first, the element OR 4, the second driver 5 of the compensating pulse. the second element OR 6. The transmitting side is connected by a link 7 to the receiving side. On the receiving side, the device contains a receiver 8 code units, the receiver 9 code features zero, the synchronized generator 10 clock pulses, the first discriminator 11 pulse duration, the second discriminator 12 pulse duration, the first counting trigger 13, the second counting trigger 13 15, the fourth countable trigger 16, the first element And 17, the second element And 18, the third element And 19. The essence of the invention is to generate on the receiving side of the signal prohibiting the transmission of information from you moves of the device for the time of pauses in the received information, as well as in checking the availability of information and compensating pulses in each transmission cycle. In the absence of one of them, no information is transmitted from the outputs of the device. 2 Il. about (L with 4ia Yu O5 00

Description

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The invention relates to information transmission systems and can be used in the construction of information control systems, automated process control systems and computing systems.

The purpose of the invention is to increase the reliability of receiving information. . Figure 1 shows the functional diagram of the device in figure 2 - time diagrams of its work.

The device contains on the transmitting side the first shaper 1 of the compensating pulse, the transmitter 2 of the code feature zero, the transmitter 3 of the code indication of the unit, the first element OR 4, the second shaper 5 of the compensating pulse, the second element OR 6. The transmitting side is connected by the link 7 to the receiving side. On the receiving side of the device, the device contains a receiver 8 of a code indication of a unit, a receiver 9 of a code indication of a zero, a synchronized generator of 10 clock pulses, a first discriminator 11 of pulse duration, a second discriminator 12 of pulse duration, the first 13, second 14, third 15 and quarter 16 triggers, first 17, second 18 and third 19 elements I.

The device works as follows.

With the arrival of the information signal 1 (Fig. 2a) through the element OR 4 at the input of the transmitter 3, the latter transmits it to the positive polarity link 7, and the generator 1, at the end of the information signal 1, generates a short signal of the opposite polarity and transmits it through the OR element 6 and transmitter 2 to link 7. As a result, a positive polarity signal and a short negative polarity signal are transmitted to link 7.

With the arrival of the information signal O (Fig. 26) through the element OR 6 at the input of the transmitter 2, the latter transmits it to the negative polarity link line 7, and the driver 5, at the end of the information signal O, generates a short signal of the opposite polarity and passes it through the element OR 4 and the transmitter Z to the link line 7. As a result, a signal is transmitted to link 7 from

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negative polarity and a short positive polarity signal.

Thus, information lines and compensating signals of the opposite information polarity are transmitted to link 7 (Fig. 2c).

From the output of the communication line 7, the distorted signals (Fig. 2d) are fed to the inputs of receivers B and 9. Positive polarity signals are amplified and generated by the receiver 8 (Fig. 2e) and transmitted to the input of the discriminator 11, which is set to the duration of the unit code signal.

Negative polarity signals

are amplified and formed by the receiver 9 (Fig. 2g) and fed to the input of the discriminator 12, which is tuned to the duration of the signal of the code feature nud. The discriminators 11 and 12 can be performed, for example, on the KC circuit and element I. From the outputs of the receivers 8 and 9, the signals are also fed to the counting inputs of the flip-flops 14 and 15, respectively. The inputs of the generator 10 are connected to the outputs of the discriminators 11 and 12 for its initial launch. 0 The duration of the pulses generated at the second output of the generator 10 is equal to the sum of the durations of the information and compensation signals (Fig 2d). The pulses from the second output of the generator 10 are fed to the second inputs of the elements AND 18 and 19. At the first output of the generator 10, at the beginning of each clock cycle, a short pulse is generated that arrives at the zero inputs of the flip-flops 13-16.

The outputs of the discriminators 11 and 12 are connected to the counting inputs of the triggers 13 and 16, respectively. The trigger 13 is triggered when a code sign 1 signal arrives at its counting input (Fig. 2h), and the trigger 16 triggers when a code sign signal O is received at its count input (fig. 2k). The second trigger 14 is triggered by the arrival of the first pulse in a pulse of positive polarity (Fig.2i), and the third trigger 15 - by the arrival of the first pulse of negative polarity (Fig.2l).

Element And 17 is triggered by the arrival in this also of positive and negative polarity pulses regardless of their duration (Fig. 2m). This makes it impossible

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false triggering when suppressing informational or compensating pulses of code characters O or 1.

Elements 18 and 19 prohibit the transfer of information for the time between clock pulses and in the absence of information or compensating pulses (Fig.2i; 2o).

In this way, the likelihood of a false positive of the device is reduced, which increases the reliability of the reception of information.

Claims (1)

Invention Formula A device for receiving and transmitting information containing, on the transmitting side, the first and second compensating pulse formers, the first and second OR elements, the first inputs of which are connected respectively to the outputs of the second and first compensating pulse formers, the inputs of which are combined with the second inputs of the corresponding OR elements and are the first and second inputs of the device, the output of the first element OR is connected to the input of the transmitter code 1, the output of the second element OR is connected to the input of the transmitter On feature code, the outputs of which podklyuchetsy to the line at the receiving side - of feature code receiver 1 and receiver code feature On whose inputs are connected to the communication line, characterized in that, in order to increase the reliability of receiving the information in it on the receiving Storo synchronized clock pulse generator, first and second duration discriminators, first, second, third and fourth triggers, first, second and third elements AND, the output of code 1 receiver are connected to the input of the first discriminator and the counting input of the second trigger, whose output is not entered connected to the first input of the first element And, the output of the receiver of the code feature O is connected to the input of the second discriminator of duration and the counting inputs of the third trigger, the output of which is connected to the second input of of the first element And the output of the first discriminator of duration is connected to the counting input of the first trigger and the first input of a synchronized clock generator; , the second, third and fourth flip-flops, the second output is connected to the first inputs of the second and third elements And, the output of the first trigger is connected with the second input of the second element And, the output of the fourth trigger - with the second input of the third element And, the output of the first element And connected to the third inputs of the second and third elements And, the output of the second element And is the unit output of the device, the output of the third element And is zero output devices. P. . I Ш LJ 1Л I PP I1 one lg one P. lg 2