SU913608A1 - Morse code forming device - Google Patents

Description

The invention relates to signal transmission devices and can be used in communication equipment for transmitting time pulse sequences in Morse code.

A device for forming Morse code ⁵ is known, which contains a clock pulse generator, a trigger, a counter and a program block, the outputs of which are connected to the inputs of the decoder 11).

However, the accuracy in forming such a ^'0 device small.

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

The goal is achieved by the fact that the device for generating the Moreh code containing a clock pulse generator, a trigger, a counter and a software block whose outputs are connected to the inputs of the de-encoder, I-NOT elements and a switch whose first output is connected to the first input of the first element NAND, the second input of which is connected to the output of the second element NAND, the first

2

the input of which is connected to the first input of the third NAND element and to the first output of the clock pulse generator, the second output of which is connected to the first input of the fourth NAND element, the second input of which is connected to the second input of the second NAND element and to the first output of the trigger, The second output of which is connected to the input of the program block and to the second input of the third NAND element, the output of which is connected to the input of the counter, the output of which is connected to the first input of the trigger, the second input of which is connected to the second output of the switch, one in the moves of which are connected to the outputs of the decoder, and the output of the fourth element AND NOT connected to the other inputs of the switch.

FIG. 1 shows the structural electrical circuit of the proposed device; in fig. 2 is a block diagram of the switch.

This device for forming

Morse code contains program block 1,

3 ’913608 4

the decoder 2, the switch 3, the generator 4 clock pulses, the first, second, third and fourth elements AND NOT 5-8, the trigger 9 and the counter 10; the switch 3 contains multiplexers 11 and 12, a dual counter 13 and the element OR NOT 14.

The device works as follows.

Program block 1 generates pseudo-random sequences of a two-five five-digit code, each combination of which is converted by a decoder 2 into a parallel Morse code combination on 20 outputs of the decoder 2, so that the pause between 15 elements corresponds to "O", point "1", hyphen "111", and by the end of the sign "00".

Conversion of a parallel Morse code combination into a time sequence is performed by 20 alternately switching the output buses of the first group of the decoder to the inverse code of the multiplexer 12. The generated pulse sequence is summed on the first AND-NOT 5 element with 25 pulses of the 4 clock pulse generator. After the output of the first EIN element 5 (device output), a temporary pulse sequence in Morse code is formed. The formation of the sign is quenched when switching to the outputs of mu-, lxplexors 11 and 12 of the adjacent tires of the decoder 2, which are below zero levels. Element 14 OR-NOT generates a signal "End sign" ₃₅ ka ", which switches the trigger 9. The second and fourth elements AND-NO 6 and .8 are closed, and the third element AND-NOT 7 is opened and the generator pulses 4 clock pulses arrive at the counter is 40 points 10. The binary counter 13 of the switch 3 is oriented to its original state, the counter 10 forms a predetermined pause, and then switches the trigger 9 to its original state. The program block 1 45 changes its state and the next five-digit enters the input of the decoder 2. binary code The cycle of the device is repeated. In operation, the device can be installed on ele- ₅₀

Dukaschie types of combinations of characters: numbers; letters of the Latin alphabet; letters of the Russian alphabet; mixed numeric and alphabetic combinations.

This is done by changing the connections in the decoder 2 according to the commands of program block 1.

The use of a switch and an NAND element at the output of the device eliminates: the need to transfer the code to the register and increases its reliability.

Claims (1)

Claim A device for generating a Morse code, containing a clock pulse generator, a trigger, a counter and a software block whose outputs are connected to the inputs of the decoder, which is different from the fact that, in order to improve the shaping accuracy, I-NOT elements are introduced The switch, the first output of which is connected to the first input of the first element AND-NO, the second input of which is connected to the output of the second element AND-NOT, the first input of which is connected to the first input of the third element AND-NOT and the first output of the clock generator, the second output cat The op is connected to the first input of the fourth NAND element, the second input of which is connected to the second input of the second NAND element and to the first output of the trigger, the second code of which is connected to the input of the program block and to the second input of the third NAND element whose code is connected with the input of the counter, the output of which is connected to the first input of the trigger, the second input of which is connected to the second switch code, one input of which is connected to the outputs of the decoder, torus, and the fourth code of the fourth AND-NOT element is connected to another switch input.