SU1478367A1 - Start-stop code combination generator - Google Patents

Abstract

The invention relates to telecommunications. The purpose of the invention is to improve the formation accuracy. The device contains rr 1 code combinations, register 2, shaper 3 codes, el-AND 4.7 and 8, el-OR 5 and 11, distributor 6, selector 9, counter 10 and trigger 12. When applied to the input the device of the clock sequence of the EL 8 and open and transmits the input pulses to the clock input of the counter 10 and to the signal input of Mr. 1. The coefficient. the count of the counter 10 is given by the code number from register 2. It determines the duration of the stop parcel issued at the output of the device. When a single signal appears at the corresponding output of the distributor 6, the unit level at the output of the device changes to zero, since its output is not connected. At the output of the device at this time, the starting package is formed. The device of clause 2 of the file is distinguished by the performance of Mr. 1. 1. Cp f-ly, 2 ill.

Description

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The invention relates to telecommunications technology and can be used in data transmission devices.

The purpose of the invention is to improve the formation accuracy.

Figure 1 shows the structural electrical circuit of the proposed device; Fig. 2 shows an embodiment of a code combination generator.

A device for generating start-stop code combinations comprises a generator of 1 code combinations, a register 2, a shaper 3 codes, first AND 4 and OR 5 elements, a distributor 6, a second 7 and a third 8 And elements, a selector 9, a counter 10, the second element OR 11 and trigger 12. Generator 1 code combinations contain shift register 13, selector 14, code converters 15 and combination register 16.

The device works as follows.

In the initial state, the clock sequence is not fed to the input of the device (Fig. 1). The shaper 3 codes generates the binary number of the code used and the accompanying clock pulse. This pulse records the code number in register 2, where it is stored when working with this code. The number recorded in the register 2 is fed to the control inputs of the selector 9, the counter 10 and the generator 1 to the control input of the selector 14 (FIG. 2). In this case, the selector 9 connects one of the outputs of the distributor 6 to its output. The output of the distributor 6 is determined by the selector 9 depending on the incoming code number. Each code number corresponds to its own code combination length, which depends on the number of working bits of the distributor 6.

The counting factor of the counter 10 also depends on the code number applied to its control input. It determines the duration of the stop parcel. The code number that arrives at the control input of generator 1 controls the output from generator 1 of the combination of one of the pledged codes.

Through the second element OR 11, a single signal from the first output of the distributor 6 is fed to the output of the device, forming a stop signal.

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When the clock sequence is fed to the input, the distributor 6 remains in the initial state, since the potential of the inverse output of the trigger 12 is supplied to the input of the second element And 7. The third element And 8 is open and passes the input pulses to the clock input of the counter 10 and the signal input of the generator 1. The counting coefficient of the counter 10 is given by the code number from register 2, it determines the duration of the stop package issued by the device output.

Clock pulses from the output of the third element And 8 supplied to the signal input of the generator 1 of code combinations record the next combination into the register 16 of the generator 1 combination.

This combination, converted in generator 1 to a combination of a code specified by a number from register 2, under the action of the clock frequency, is sequentially outputted to the generator 1.

The overflow signal of the counter 10 transfers the trigger 12 to the zero state, at which the output clock pulses go to the clock input of the distributor 6 through the second element I 7. When a single signal appears at the corresponding output of the distributor 6, the unit level at the output of the device changes by zero, since its output is not connected. At the output of the device at this time, the starting package is formed. Subsequent pulses cause the appearance of a single signal at the third, fourth, and so on outputs of the distributor 6. The number of outputs used is specified by the code number and depends on the length of the code combination in the code used. The single signals from the outputs of the distributor 6 form at the output of the first element OR 5 a clock sequence arriving at the first input of the first element AND 4.

The number of pulses corresponds to a given length of the code combination. Generator 1 generates characters of the code combination specified by the code number.

Recorded in the register 16 combinations of the leading edge of the clock pulse from the output of the third element

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And, a binary code combination 8 is applied to the inputs of code converters 15. The number of code converters 15 corresponds to the number of codes used. The outputs of the code converters 15 are connected to the information inputs of the selector 14. To the control input of the selector 14, the code number is supplied from register 2. Depending on this number, the selector 14 transmits to the information input of the shift register 13 a code combination of one (determined by the code number) code converter 15. Next, the falling combination of the shift register 13 by the falling edge of the clock pulse is output to the output of the shift register 13, and therefore, the output of the generator 1, the clock frequency coming from the exhaust of the second element And 7 nor the clock input of the generator 1. Through the first element And 4 and the second element OR 11, the code combination of the generator and 1, The generated at the input of the first AND gate 4 is provided on the output device.

The selector 9 controls the trigger 12 The code number entering the control input of the selector 9 determines which of the outputs of the distributor 6 should be connected to the output of the selector 9. In this case, a single signal from the corresponding output of the distributor 6 through the selector 9 enters the input of the unit set to the trigger 12 . This signal translates the trigger 12 in. the unit state and sets the distributor 6 to the initial state with a single signal at the first output.

The input of the clock sequence to the distributor 6 is blocked by trigger 12. Clock pulses through the third element And 8 are sent to the clock input of the counter 10 and to the signal input of the generator 1. At the same time, a dressing of a specified duration is formed at the output of the device and the next combination is recorded in the generator 1 in the register of 16 combinations.

Claims (2)

1. A device for generating start-stop code combinations comprising a distributor, the outputs of which are connected to the inputs of the per0 five 0 five 83674 the OR element, the output of which is connected to the first input of the first AND element, and to one input of the second OR element, the other input of which is connected to the output of the first AND element, to the second input of which the output of the code combination generator is connected, the clock input of which is connected to the output of the second AND element, the first input of which is the input of the device, the output of which is the output of the second OR element, characterized in that, in order to improve the formation accuracy, a trigger, a counter, a register, a selector, a third AND element and shaper code, the outputs of which are connected to the inputs of the register, the outputs of which are connected to the control inputs of the generator of code combinations, the signal input of which is connected to the output of the third element And, the selector, to the information inputs of which the corresponding outputs of the distributor and the counter whose output is connected to the first installation the trigger input, the second setup input of which is connected to the output of the selector and to the installation input of the distributor, to the clock input of which the output of the second is connected And, the first and second inputs of which are connected respectively to the first input of the third element And, the output of which is connected to the clock input of the counter, and with the inverse output of the trigger, and the corresponding output of the distributor is connected to the second input of the third element I. 2. The device according to claim 1, of which is that the code combination generator comprises code converters, a shift register, a selector and a register of combinations, the output of which is connected to the inputs of code converters, the outputs of which are connected to information inputs, the selector whose output is connected to the information input of the shift register, the output of which is the output of the generator of code combinations, the signal, clock and control inputs of which are respectively the signal 5 input of the shift register, which is connected to the input of the register, combinations, the clock input of the shift register and the control input of the selector. 0 five 0 five 0 Phie.1