SU1758863A1 - Device for pulse selection by duration - Google Patents

Abstract

The invention relates to a pulse technique and can be used in automated communication systems, control and monitoring, in particular in air traffic control systems and instrumentation. The device for selecting pulses by duration contains trigger 1. shapers of 2 and 7 pulses, registers 3 and 14 of memory, elements AND 4, 11 and 17. elements OR 5 and 18, multiplexer 6, element 8, fixed memory 9. block 10 code comparisons, pulse generator 12, pulse counters 13 and 15, decoder 16, converter 19 Time-interval code, input bus 20, output bus 21. Ensuring the possibility of selection from a pulse sequence of pulses of a given duration while ensuring the possibility x duration on the output bus allows to extend the functionality of the device. 1 il.

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The invention relates to a pulse technique and can be used in automated communication systems, control and monitoring, in particular in air traffic control systems and instrumentation.

A pulse selector is known in duration, comprising a pulse generator, first and second pulse counters, a code comparison unit (BSK) and a pulse shaper, the input of which is connected to the input bus of the device and the first input of the first match element, the output of which is connected to the counting input of the first counter pulses, the reset input of which through the delay element is connected to the output of the pulse driver and the first input of the second coincidence element, the second input of which is connected to the output of the BSK, the first information inputs which is connected to the information outputs of the first pulse counter, and the second information inputs to the information outputs of the second pulse counter, the counting input of which is connected to the output of the third coincidence element, the first input of which is connected to the selection bus of the second element coincidence and the output of the pulse generator.

The disadvantage of this device lies in the fact that it does not provide for the selection of a pulse of maximum duration from a series of pulses with a variable duration.

It is also known a device for selecting pulses by duration, containing a pulse generator, BSK, three pulse counters, pulse shapers, a decoder, a multiplexer and a code converter in a time interval, while the count input of the first pulse counter is connected to the output of the pulse generator, whose input is connected to the input bus, the counting input of the third counter and the input of the imager, the output of which is connected to the control inputs of the first, second and third counters, the information outputs of the first and second counts Pins are connected to the multiplexer information inputs. information outputs of which are connected to information inputs of the second counter and code converter in a time interval, the control input of which is connected to the output of the decoder and the reset input of the third pulse counter, information outputs of which are connected to the input of the decoder This device does not provide automatic selection of pulses, if analyzed

several bursts of pulses, since the resetting of the counters requires turning off and then turning on the power supply. In addition, the accuracy of the analysis can be broken due to the lack of a signal to zero the second counter before analyzing each input pulse.

The closest in technical essence and purpose is the pulse selector in duration, containing an input bus that is connected to the input of the first pulse shaper and to the control input of the pulse generator, the output of which is connected to the counting input of the first pulse counter, the outputs of which are digitally connected to the inputs the first group of inputs of the code comparison unit, the inputs of the second group of inputs of which are bitwise connected to the outputs of the memory register, as well as the trigger, the second pulse shaper, the OR element a code to time converter whose output is connected to the first output bus. This device also contains a serially connected second pulse counter and a decoder, a pulse loss detection unit, a second output bus and a multiplexer, the control input of which is connected to the output of the code comparison unit, the inputs of the first group of information inputs - bitwise with the outputs of the first pulse counter, the second inputs groups of information inputs are bitwise with the outputs of the memory register, and outputs are bitwise with the information inputs of the memory register and also bitwise with the informational inputs of the transform code bodies in the time interval, the control input of which is connected to the output of the decoder and the reset input of the trigger, the output of which is connected to the input of the second pulse generator, the output of which is connected to the reset inputs of the memory register and the second pulse generator, the counting input of which is connected to the output of the OR element , the first input of which is connected to the input bus and the trigger setup input, and the second input - to the first input of the pulse loss determination unit, the input of which is connected to the input bus, and the second output - to the second output otherwise, the first reset pulse to the counters input coupled to the output of the first pulse shaper, This apparatus, only isolated pulses of maximum duration, limiting its application, since it does not provide other selection pulses

The purpose of the invention is to expand the functionality by providing

the possibility of selecting from a pulse sequence of pulses of a given duration while ensuring the possibility of storing their duration on the output bus.

A positive effect is determined by a significant expansion of the field of application of a device for selecting pulses in duration while simultaneously improving the characteristics of systems where this device is used, such as: stealth, imitation resistance, and noise immunity. Moreover, the greatest effect is achieved by using a pulse selection device for duration in communication systems and control systems, where pulse-width signals and signals with pulse-time coding are used.

The essence of the invention is that a known device comprising a trigger, the installation input of which is connected to the input bus and the control input of the pulse generator, and the output - to the input of the first pulse driver, the output of which is connected to the reset input of the first memory register, the outputs of which are bitwise connected to the inputs of the first group of inputs of the code comparison unit and also bitwise to the inputs of the first group of information inputs of the multiplexer, the outputs of which are bitwise connected to the information inputs of the first About the memory register and also in series with the information inputs of the converter The time-interval code, the output of which is connected to the output bus, the input bus is connected to the input of the second pulse shaper and the counting input of the second pulse counter, the output of the pulse generator is connected to the counting input - the house of the first pulse counter, the output of the first pulse distributor is connected to the reset input of the second pulse counter, the outputs of which are bitwise connected to the inputs of the decoder, as well as the first OR element, according to In addition, an NOT element, a second memory register, first to third AND elements, a permanent storage unit and a second OR element, the output of which is connected to the control input of the converter, are introduced. The first input is from the output of the second AND element. and the first input of the first element OR, and the second input with the reset input of the trigger and the output of the third element AND, the first input of which is connected to the output of the decoder, and the second input - with the output of the element NOT, the first input of the first element AND, the input of the first register memory and first

the reset input of the first pulse counter, the second reset input of which is connected to the output of the first pulse shaper, and the outputs are bitwise with the information inputs of the second memory register, the recording input of which is connected to the input bus, and the inputs to the second input of the second g code comparison and also bitwise with the inputs of the second group of multiplexer inputs, the control input of which is connected to the output of the first OR element, the second input of which is connected to the output of the first AND element, the second input of which is connected with the first output of the code comparison unit, the inputs of the first group of inputs of which are bitwise connected to the outputs of the permanent storage unit, and the second output to the first input of the second element And, the second input of which is connected to the resolution input of the permanent storage unit pulses and the input element is NOT. The drawing shows a functional diagram of the device for the selection of pulses in duration.

The device for selecting pulses by duration contains trigger 1, shaper 2 short pulses, two registers 3, 14 memory, three elements AND 4, 11, 17, two elements OR 5, 18, multiplexer b, driver 7 pulses, element 8, constant This storage unit 9, code comparison unit 10, pulse generator 12, two counters 13, 15 pulses, decoder 16, converter 19 Code-time interval, input bus 20, output bus 21. In this case, the trigger setup water 1 is connected by the input bus 20 and generator control input 12 pulses, and the output - with the input of The first shaper 2 short pulses, the output of which is connected to the reset input of the first register 3 of the memory, whose outputs are bitwise connected to the inputs of the first group of inputs of the code comparison unit 10 and also bitwise to the inputs of the first group of information inputs of the multiplexer 6, the bits of which are connected bitwise with the information inputs of the first register 3 memory and also bitwise with the information inputs of the converter 19 Code-time interval, the output of which is connected to the output bus 21, and the input bus is connected to in Odom second pulse shaper 7 and the counting input of the second pulse counter 15, the output of the pulse generator 12 is connected to the counting input of the first pulse counter 13 pulses, the output of the first shaper 2 short pulses connected to the reset input of the second counter

15 pulses, the outputs of which are serially connected to the inputs of the decoder 16, the output of the second element OR 18 is connected to the control input of the converter 19 Code-time interval, the first input of the element OR 18 is connected to the output of the second element AND 11 and the first input of the first element OR 5 and the second input is with the reset input of the trigger 1 and the output of the third element AND 17, the first input of which is connected to the output of the decoder 16, and the second input - with the output of the element HE 8, the first input of the first element 4, the recording input of the first register 3 memory and the first reset input The first counter of 13 pulses, the second reset input of which is connected to the output of the first driver 2 pulses, and the outputs are serially connected to the information inputs of the second memory register 14, the recording input of which is connected to the input bus 20, and the outputs are identical to the inputs of the second group of inputs block 10 of code comparison and also bitwise with the inputs of the second group of inputs of multiplexers b, the control input of which is connected to the output of the first element OR 5, the second input of which is connected to the output of the first element AND 4, the second input of which is connected to The first output side 10 of the code comparison, the inputs of the first group of inputs of which are bitwise connected to the outputs of the persistent storage unit 9, and the second output to the first input of the second element 11, the second input of which is connected to the enable input of the permanent storage unit 9, with the output the second shaper 7 pulses and the input element is NOT 8.

The device for the selection of pulses in duration works as follows. When a monitored sequence arrives at the input bus 20 on its leading edge, trigger 1 and shaper 2 short pulses are triggered. From the output of shaper 2, a pulse less than the pulse period of the generator 12 is applied to the reset inputs of the register 3 of the first and second counters 15 , 13, brings them to the initial (zero) state. The duration of each of the input pulses is converted into a code using a pulse generator 12 and a counter 13. The code of the current duration of the input pulses is rewritten from the bits of the counter 13 to the memory register 14, which is open to write the code for the duration of the input pulses. It compares the codes of the current duration with the codes of a given duration, storing the miss in ROM 9, and with the code stored in memory register 3. The time for comparing the current code with the codes of a given duration is determined by the strobe, which is generated by the shaper 7. Shaper 7 is triggered by the arrival of each input pulse and forms a strobe, the duration of which is slightly longer than the length of the maximum of the analyzed signals. The strobe of the imaging unit 7 connects the outputs of the ROM 9 to the data transmission bus associated with the first group of inputs of the code comparison unit 10. If the current register code 14 is the same as

5 is specified, then the BSK signal forms a signal allowing the passage of the coffin of the driver 7 through the elements OR 5, 8 to the control inputs of the multiplexer b and the converter 19 Time-code interval. In this case, the pulse code of a given duration from the outputs of the memory register 14 through the multiplexer 6 will go to the information inputs of the converter 19, which will lead to the appearance of the device

5 pulses of a predetermined duration. At the end of the strobe, at the output of the former 7, the ROM 9 unit is disconnected from the information bus, and the unit level signal that appears at the output of the HE element 8

0 connects the outputs of register 3 memory to this bus for transmitting the code information to the first group of inputs of the BSK 10. In this case, the information inputs of the BSK 10 receive codes from the outputs of the registers 3, 14 params. In case the current duration code from the outputs of memory register 14 is greater than the code output from memory register 3, then the output of multiplexer 6 will be connected to memory output of memory register 14 and

0, information in register 3 of memory will be overwritten, Otherwise, the output of multiplexer 6 will be connected to the output of register 3 of memory and the state of register 3 of memory will be confirmed. So

5, in the register 3 of the memory will always be stored the code of the longest duration from the number of impulses which have gone down to the input. Upon the arrival of the last pulse of the packet at the output of the decoder 16, the signal turns on, which, after the strobe of the driver 7, resets the trigger 1 and allows the maximum duration code to pass from the memory register 3 output, through the multiplexer 6 to the information inputs of the converter 19 Code-time interval. When this occurs, a maximum duration pulse will be generated at the device output.

Tskim way, the device for the selection of pulses in duration provides

automatic selection of pulses of maximum and other predetermined duration from an arbitrary number of packs of input pulses while maintaining the duration of the selected pulses at the device output.

Claims (1)

The invention of the Pulse Selection Device by Duration, containing a trigger, the installation input of which is connected to the input bus and the control input of the pulse generator, and the output to the input of the first pulse shaper, the output of which is connected to the reset input of the first memory register, outputs bitwise connected to the inputs of the first group of inputs of the code comparison unit and also bitwise connected to the inputs of the first group of information inputs of the multiplexer, whose outputs are bitwise connected to the information inputs of the multiplexer pvogo memory register and also bitwise with the information inputs of the converter Code-time interval, the output of which is connected to the output bus, the input bus connected to the input of the second pulse shaper and the counting input of the second pulse counter, the output of the pulse generator is connected to the counting input the first pulse counter, the output of the first pulse generator is connected to the reset input of the second pulse counter, the outputs of which are bitwise connected to the inputs of the decoder, and the first element OR is distinguished by EEC in that, in order to expand the functional possibilities by providing capabilities of CE lektirovani pulse sequence the pulse duration of a given duration while ensuring the possibility of storing their duration on the output bus, the element NOT, the second memory register, the first to the third AND elements, the permanent storage unit and the second OR element, whose output is connected to the control input of the converter, are entered into it Code-time interval, the first input - with the output of the second element And the first input of the first element OR, and the second input - with the reset input of the trigger and the output of the third element And, the first input of which is connected to the output d the encoder, and the second input - with the output of the element NOT, the first input of the first element I. the input of the recording of the first memory register and the first input of the reset of the first pulse counter, the second input of which is connected to the output of the first pulse shaper, and the outputs are identical to the information inputs the second memory register, whose recording input is connected to the input bus, and the outputs are bitwise with the inputs of the second group of inputs of the code comparison block and also bitwise with the inputs of the second group of multiplexer inputs, the control input of which one with the output of the first OR element, the second input of which is connected to the output of the first element AND, the second input of which is connected to the first output of the code comparison unit, the inputs of the first group of inputs of which are bitwise connected to the outputs of the permanent storage unit, and the second output to the first input the second element And, the second input of which is connected to the input of the resolution of the permanent storage unit, with the output of the second pulse shaper and the input of the element NOT.