SU1231637A1 - Generator of two-frequency call serial code - Google Patents

Abstract

The invention relates to telecommunications and can be used in telemechanics systems and selective technological communication. The time required to form a two-frequency calling sequential code is reduced. The device contains a multi-frequency generator (MCHG) 1, switch n 2, two triggers 3 and 4, two counters (C) 5 and 6, control unit (UB) 7, element OR 8, initial setup block 9, pulse distributor 10, two pulse selector 11 and 12 and pulse generator 13. The program of the device is set by the UB 7. The switch 2 switches the information from outputs C 5 and 6 to the corresponding information inputs of the MHG 1. The pulses from the 2nd output of the UB 7 through trigger 4 arrive at the control input MICH 1 and determine the duration of the formation In it, each of the often code. The code generation time is determined by the time of the UX 7 operation. The device allows to form (M N) combinations of a two-frequency calling serial code, where W and N are capacitances C 5 and 6. The code is formed from the following one after another frequency dressings (- {- - f ). 2 Il. with S CL

Description

The invention relates to telecommunications and can be used in systems of selective technological communication and in telecontrol systems for the formation of a call sequence code.

The aim of the invention is to reduce the generation time of a two-part ringing code.

FIG. Figure 1 shows the structural electrical circuitry of the driver, dual frequency calling sequential code; in fig. 2 are time diagrams of signals that show the work of a fordator.

The proposed driver contains a multi-frequency generator 1, a switch 2, the first and second triggers 3 and 4, the first and second counters 5 and 6, the control unit 7, the OR element 8, the initial installation block 9, the distributor 10 pulses, the first and second selectors 11 and 12 pulses 13 pulses.

The shaper works as follows.

When the power is turned on, the unit 9 of the initial installation (Fig. 1) generates a pulse of resetting the distributor 10 pulses, the first and second counters 5, 6, and the first trigger 3 to the initial state.

The signal from the inverse output of the first trigger 3 to the second trigger 4 is also reset. In this case, the switch 2 and the control unit 7 are turned off by a signal from the direct output of the first trigger 3.

The multi-frequency generator 1 does not generate oscillations, since all its information inputs contain logical O signals.

The first selector 11 pulses (in duration) responds to pulses of logical O - dialing with a duration of at least (Fig. 2.6), and the second selector 12 pulses (in duration) - with pulses of logical 1 with a duration of at least (Fig. 2, c). At the input of the generator of a dual-frequency ringing serial code, there is a logical signal (Fig. 2, a, i (, - t,)) which keeps the second pulse selector 11 in the off state. Logical O signals at the outputs

the distributor 10 pulses block the operation of the first and second counters. 5.6 and the first trigger 3.

To the input of the former two-frequency calling sequential code generator, a codogram is sent consisting of a Reset signal, two-digit dialing pulses and inter-series pauses (Fig. 2, a).

By the Reset (-t, -t) signal, the second pulse selector 12 is set to the zero state (Fig. 2, c). If the duration of the Reset signal exceeds the selection time t, the first pulse selector 11, then at time i the first pulse selector 11 turns on (Fig. 2.6). Setting it to its initial state occurs at the moment of time i with the Pause signal (Fig. 2.6).

After the termination of the signal, the dump at the input of the driver is held in. An intermittent pause () with a duration of at least t. In this case, the second pulse selector 12 is triggered and the signal logical 1 appears at the first output of the pulse distributor 10, enabling the first counter 5 to count (FIG. 2, d). The shaper of the two-frequency calling sequential code is ready To receive dialing pulses. ,

Dial pulses are fixed by the first pulse selector 11 pulses. The first counter 5 counts the number of pulses of the first digit of the number (Fig. 2) At the end of the first series of pulses at the input of the generator of the two-part calling code, an inter-series pause is maintained (Fig. 2, a, ig - t). This activates the second pulse selector 12 (Fig. 2, c) and at the second output of the pulse distributor 10 a logical signal 1 appears (Fig. 2 d), enable the counting to the second counter 6, which counts the number of pulses in the second digit of the number.

After dialing the number after a time, the second pulse selector 12 (Fig. 2.6, tj) is activated again and at the third output of the pulse distributor 10 a logical 1 signal appears (Fig. 2, e), which blocks the operation of the pulse distributor 10 and enters to the information input of the first trigger 3. On the front of the clock frequency pulse (coming from the output

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pulse generator 13) at time i, the first trigger 3 is set to one and the signal from the direct output turns on the control unit 7 and switch 2 (Fig. 2.3, g), and the logical O signal from the inverse output enables the second trigger 4. Switch 2. commits information from the outputs of the first and second counters 5 and 6 to the corresponding information inputs of the multi-frequency generator 1.

The program of operation of the imager sets the control unit 7. The pulses from the second output of the control unit 7 (Fig. 2,) through the second trigger

4 enter the control input of the multi-frequency generator 1 and determine the duration of the formation of each of the code frequencies (Fig. 2, k).

 The code generation time is determined by the time of operation of the control unit 7. At the moment of time the control unit 7 is activated and at its second output the c6pioca pulse of the first and second counters

5 and 6, the distributor 10 pulses

and the first trigger 3 to the initial state. The signal from the direct output of the first trigger 3 turns off the switch 2 and the control unit 7, and the signal from the inverse output of the first trigger 3 sets the second trigger 4 to its initial state. The shaper is ready to receive the next codogram.

The device allows to form (M-) combinations of a two-frequency sequential code, where M is the capacity of the first counter 5j N is the capacity of the second counter 6. The code is formed from the following one after the Other frequency parcels ()

Claims (1)

Claims of the Invention A dual frequency shaper serial code generator containing the first and second triggers, a multifrequency generator and an OR element, the output of the multifrequency generator. The nerator is a shaper output, characterized in that. that, in order to reduce the time of formation of the dual-frequency ringing 5 serial code, the sequentially connected pulse generator, the first pulse selector, the pulse distributor, the first counter and the switch, the successively connected second pulse selector and the second counter, and the control unit are entered into it. and a setup block, with the output of the pulse generator connected to the counting input of the first trigger and to the combined clock inputs of the control unit and the second pulse selector whose output is connected to the counting input of the first counter, 20 input Resolution of the second counter is connected to the second output of the pulse distributor, the third output of which is connected to the input Resolution of the pulse distributor 25 and the 33 input of the first trigger, the direct output of which is connected to the combined control inputs of the control unit and the switch, the inverse output of the first trigger through 30, the second trigger is connected to the control input of the multi-frequency generator, the inverse output and the counting input of the second trigger are connected respectively to the KPT - input of the second trigger and the first output of the control unit, the second output of which is connected to the pulse distributor, the first and second counters 0 and the first trigger, the output of the second counter is connected to the corresponding signal inputs of the switch, the outputs of which are connected to the corresponding information inputs 5 of the multi-frequency generator, and the output of the setup block is connected to the second input of the OR element, and the combined signal inputs of the first and second pulse selectors are the input of the driver. с8ros „„, digit „.„. 2 digits, pads Editor N. Slobod Nick Compiled by, Orlov Tehred G.Gerber Proofreader V. But Order 2663/59 Circulation 626 Subscription VNIIPI USSR State Committee for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5  - - - - - - - - -. “.” „„ “- .-“ .- - .-,. Production and printing company, Uzhgorod, st. Project 4