SU411658A1 - - Google Patents

Description

one

This invention relates to the field of telegraphy.

The electronic distributor is known, which, having entered into synchronization with the telegraph signal, begins the next cycle of operation after the arrival of the startstone differential (transition from the stop parcel to the starting one) of the telegraph signal; after the formation of the received sign in parallel form and the issuance of the sync pulse of the sign, it stops working until the next start-stop differential arrives. For this, in the distributor, pulses from the generator are passed to the parcel filling counter through a matching circuit controlled by a trigger. In a state that permits the passage of pulses through a coincidence circuit, the trigger is set by pulses generated by start-stop differences. The trigger is transferred to the forbidden state by the sync pulses of the sign, issued by the parcel counter, after the formation of each sign.

Odiako in the well-known distributor in the absence of start-stop differences in the telegraph signal (during interruptions in operation and “pressing or“ unwinding) the start-stop distributor does not work and does not generate sync pulses required for the operation of analysis devices and memory devices,

To compensate for this disadvantage, additional dividers are used, which form ipairevio zpak sync pulses, which leads to an increase in size and complexity of the device due to the presence of two zpak sync pulses.

In order to simplify the electronic distributor circuit that generates zpak sync pulses, both when receiving text characters and “pressing or“ unwinding, ”in the proposed distributor, the output of the differential terminal and the trigger output, the output of the trigger node are connected to the impulse input of the coincidence unit connected simultaneously to the input of the thrgger and the reset pulse shaper, the output of the latter is connected to the reset inputs of the package fill counter and the package counter, with the output of the package counter connected chei to the other input trigger and the other input of the decoder.

The drawing shows a block diagram of the proposed distributor.

The proposed distribution contains input telegraph parcels 1, a generator 2, a counter 3 pulses filling the elementary parcels of the sign with a recalculation module 32, a counter 4 parcels with a recalculation module 7, a gate 5 extracting node 5, a gating node 6, a drive 7, a decoder 8,

shaper 9 pulse reset, trigger 10, node 11 coincidence and differentiating circuit 12.

The electronic distributor works as follows.

The generator, 2, operates in continuous mode and generates I1 filling and input pulses. The frequency of oscillator 2 is chosen in such a way that 32 filling pulses are placed in one telegraph signal transmission, which reach the counter 3 with recalculation module 32, which generates the transmission pulses. The reset pulses, the counter 3, is set to state 00001, with the result that at its output the first burst of the parcel appears after 16, and all subsequent pulses after 32 pulses of filling.

Thus, the sync pulses of the parcels are shifted half of the parcel and coincide with the middle of the telegraph signal, which allows gating of the telegraph parcels at the least distorted points in the middle of the parcel.

Counter 4 parcels recalculates modulo 7 sync pulses and generates sync pulses. The states of counter 4 are deciphered by a gambling imimuls extraction circuit 5, which selects from the 1st to the 7th gates of the parcels. The sequence in the strobing scheme 6, which is the seven coincidence schemes, strobes the telegraph sigal and records it in parallel form in the accumulator 7. The sign sync pulse coinciding with the middle of the 7th (stop) parcel is set to trigger one 10 In this state, controlled by trigger 10, coincidence node 11 is open, and its pulse input receives impulses generated by differentiating circuit 12 in terms of differences from the current parcel to the non-current one.

The first pulse after the sync pulse, corresponding to the start-stop differential, passes through the coincidence node 11, sets the trigger 10 to the "zero state

and through the imaging unit 9, the counters 3 and 4 are reset.

Thus, the operation of the counters 3 and 4, and, consequently, the formation of the next character, is synchronized with the passing sign of the telegraph sial.

During breaks in operation (on the "press or" release), when the fronts of the telegraph signal are absent, the counters 3 and 4 are not reset, the frequency of the following sync pulses is determined by the frequency of the generator 2 divided by the counters 3 and 4.

Subject invention

An electronic distributor containing a series-connected generator, a parcel filling counter, a parcel counter, a gate pulse extraction unit,

the gate node, the drive and the decoder, while the input telegraph parcels are fed to the input of the differentiating circuit and to the other input of the gate node; match node, trigger and pulse shaper

A reset, characterized in that, for the sake of simplicity, the output of the differentiating circuit is connected to the pulse input of the matching node, and the trigger output, the output of the coincidence node are connected to its potential input

connected simultaneously to the input of the trigger and reset pulse shaper, the output of the latter is connected to the reset inputs of the package fill counter and the package counter, while the output of the package counter is connected

to another input of the trigger and to another input of the decoder.