SU123206A1 - The method of transmission of electrical signals - Google Patents

Description

The invention relates to methods for transmitting signals via wired communication channels by means of contactless receiving and transmitting devices (telephony, signaling, telecontrol, telemetry, etc.) performed on magnetic elements with a rectangular hysteresis loop, in which, unlike the known , for transmitting information they use unsynchronized clock generators with a certain frequency ratio and an additional code.

Magnetic cells built on ferrites with square hysteresis loops (BCPs) are used to switch the elements of individual nodes of communication devices.

FIG. Figure 1 shows the cumulative cell diagrams, cell 2, different from the cell / double-section magnetic cores, prohibition cell 5, dnamnical trigger 4, inverter 5, matching circuit 6 and amplifying cell 7.

FIG. Figure 2 shows the leading edge marker 8, the trailing edge marker 9, the annular unsynchronized circuit 10, the distributive unsynchronized counting circuit 11, and the binary counter 12 made on the basis of the application of circuits 1-7.

The front edge marker 8 contains a cumulative cell and a prohibition cell, connected so that when entering a series of pulses, one of them corresponding to the first signal is noted.

The trailing edge marker 9 contains similar cells that are connected so that a single pulse at the output appears after the termination of a series of pulses at the input.

The ring asynchronous circuit 10 stores the entered information in the form of "one" states moving according to the ring circuit. A matching circuit 13 is connected to circuit 10, at the output of which, when pulses are "read", a train of pulses appears, the number of which is equal to the number of signals recorded.

No. 123206-2. Distributive desynchronized counting circuit 11 is a cascade connection of dynamic triggers 14-24 controlled by chains of their inhibitions. Control signals are switched on in turn to interconnected even and odd inputs of these flip-flops. If the start impulse includes a trigger 14, then at each change in the state of the inhibit chains the next trigger will be turned on and off.

The distribution circuit 11 is controlled by a trigger with a common input (counting trigger) containing a prohibit cell 25 "and a dynamic trigger cell 26.

Binary counter 12 is a cascade triggers off, each of which consists of ban cells 27-30 and cells 31-34 dynamic triggers. When a pulse train is fed to the input of this circuit, it is converted into a binary code.

Based on the use of schemes 8, 9, 10 and // the authors have developed a number of options allowing to implement the proposed principle of communication:

1. Transmission using an unsynchronized ring circuit with a clock generator, which has a follow-up frequency exceeding three times that of the clock generator at the transmitting end, at the prospective end of the circuit. At the same time, at the receiving end, any of the three counting circuits 10-12 can be used.

2. When transmitting with the aid of a complementary binary ode at approximately the same clock frequency at the transmitting end, it is possible to use binary counters 12 at the transmitting end and at the receiving end, binary counter 12 at the transmitting end and a binary counter 12 at the transmitting end and an annular unsynchronized circuit 10 at the receiving.

3. When transmitting with the help of an additional decimal code at approximately identical frequencies following clock pulses at the transmitting and receiving ends, distribution counting circuits can be used // at the transmitting and receiving ends, the distribution counting circuit 11 at the transmitting end and the binary counter 12 at the receiver as well as the distribution counter circuit // at the transmitting end and ring circuit 10 at the receiver.

Information is inputted into the device in a slow way (via a dialer), and then at a rate determined by the frequency of the clock, transmitted through the switching path.

The choice of the embodiment of the proposed signal transmission method is determined by the technical feasibility and economic feasibility that exist in a particular practical case. If immediate decryption is not required, then a ring circuit can be applied at the receiving end of the line. If full decryption is necessary, it is more convenient to use the distribution scheme. The binary circuit at the receiving end should be used if a switch to a binary code, a relay contact or electromagnetic device is required.

When the attenuation of the signal at the receiving end of the line (cable conductor with a diameter of 0.7 mm and a length of 20 km) requires the installation of an amplifier assembled, for example, on two semiconductor triodes of type P1-A or P6-A. At the output of such an amplifier, a bell-shaped current pulse is formed, which, by its duration, overlaps two clock gaps that can control the counting circuit. Last thing

The circumstance allows the proposed principle to be applied to the transmission of information over complex networks of great length (for example, several automatic telephone exchanges).

Subject invention

A method of transmitting electrical signals in an ATC communication system using contactless magnetic elements with a rectangular hysteresis loop, characterized in that, to transmit signals using unsynchronized clock generators, additional codes are used, for example, to transmit information for binary counting circuits and 11-p for decimal, and signaling is carried out at a rate determined by the frequency of the tracking pulses of the transmitting device, at a frequency of following these pulses in the receiver is several times greater than in the transmitter, or at a speed several times lower than the frequency of the clock, when the frequency of the forward pulses of the receiver and transmitter is similar.

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