SU1311008A1 - Tuneable selector of pulse sequences - Google Patents

Abstract

The tunable pulse sequence selector (PI) can be used in devices for measuring and analyzing the time parameters of the PI, It contains a generator of 1 clock pulses, counters 2, 8, 9, 16 pulses, bus (III) 3 controls, triggers 4, 14, 17, memory devices 5,6, input Ш 7, assembly element (Э) 10, 311, 18 coincidences, one-shot 12, 13, prohibition block 15 and output Ш 19. The invention allows to save the time parameters of the selected PI, 2 Il. oh oh c

Description

The invention relates to a 1-1Mpulse technique and can be used in devices for measuring and analyzing temporal parameters of impulse X, at a time, that is, the battery is one of them.

The purpose of the invention is to preserve the time parameters of the selectable pulse sequence.

Fig. 1 shows a structural electrical circuit of a tunable pulse train selector; figure 2 - timing charts of his work.

The tunable pulse sequence selector contains a clock pulse generator 1, the output of which is connected to the counting input of the first counter 2 pulses, the control inputs of which are connected to the control terminal 3, and the overflow output - the counting input of the first trigger 4, memory devices 5, 6, read inputs / The recording of which is connected to the direct and inverse output of the trigger 4, respectively, and the information inputs are connected to the input 1, the second and third counters 8, 9 pulses whose counting inputs are connected to the output r not ratora 1, and the outputs of the bits to the address inputs of the storage devices 5j 6, respectively, 5 inputs set the initial state of the counters 8, 9 are connected to the overflow output of the counter 2 pulses, the control input of the lower bit of each of the counters 8, 9 connected; the input Read / Write memory of their devices 5.6 respectively, Parvii and the second inputs of the assembly element 10 are connected to the outputs of the storage devices 5, 6, respectively. The first and second inputs of the element 1 1 are falling-connected to the bus 7 and the output of the element 10 of the assembly, respectively. Two one-shot 2 and 13, the second trigger 14, the S-input of which is connected to the output of the terminal 11 match through the first one-vibration 2, R-input - to the input bus 7 via the second one-shot 13j and output with the first input of the prohibition unit 5, the second input of which is connected with the output of counter 2,

Block 15 of the ban contains sequentially connected 16 counts of pulses, the third tri1 ger 175 of the recording of the recording of which is connected to

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the installation input of the pulse counter 6 is the initial state and the second input of the prohibition block 15, and the coincidence element 18, the first input of which j is connected to the counting input of the counter 16 and the first) input of the prohibition block, and the second input of the trigger 17, the output of the element 18 match connected

WITH KROKODNAYA P1INOY 19,

0 Tunable selector and stup-Hijix sequences works as follows f

On the control bus 3 of the pulse counter 2, a code is issued defining

i value of C12 electoral period. The counting input of the counters 2, B and 9 pulses receives the clock pulses (Uj) from the generator I. As the clock pulses arrive, the counter 2

0 passes successively from the first to the Mth state, where N is the coefficient of recalculation of counter 2, depending on the code on its control inputs, Pz K-state with the arrival of the next

J clock pulse counter 2 goes into the first season, From the output of the overflow of counter 2 to the counting input of trigger 4 and the pa inputs for setting the sad state of counters 8 and 9

-30 receives nMnyjn c (Uj), which throws trigger A into the opposite state (U) p, for example, into a state in which memory 5 is fed to a signal enabling recording, and memory 6 is receiving a signal -Given 5 at this time, counter 8 is set to the initial state O, counter 9 - to E-; the initial state

40 H,

When the state of the trigger 4 changes to the counter-counter 8, it is set to state 1, the storage device 5 is in the state Read 5 the counter 9 is in the state storage 6, it is in the state Record, Input information (Ugj) j representing 50 a sequence of pulses a, b, c, etc.5 is written to the memory device 5 5, 6 alternately (Uj, L () after a time interval equal to t T- at addresses corresponding to the state of the counters 8, 9 respectively, where Tp is the period of a revolution — 1) 1and pulses np the output of the generator {) a 1 ;; N - the number of memorized memorized ones - the structure of j is equal to

The conversion factor for the counter 2j T is the breeding period.

The time interval between the recording of information in any cell of one of the storage devices and the reading of information from this cell is equal to T N - Tr. The coincidence element 11 performs a logical multiply operation of the input signal present at the time (Ugjf) and the voltage of the previous signal the output element of the Assembly 10 (U), memorized in one of the storage devices 5, 6 and shifted when reading from it one cycle to the left. In this case, at the output of element 1 1, the coincidence period of the pulse sequence (s) coincides with the period of the input pulse sequence (Ugy). To restore the duration of the selected pulses, the voltage from the output of the element 11 coincidence goes to the one-shot 12, where a short pulse is formed on the leading edge of the pulse () i ° which sets the trigger 14 to state 1, the one-shot 13 forms a short pulse on the falling front of the input pulse () which returns trigger 14 to the zero state. At the output of the trigger 14, those impulse sequences (C, ...) J contained in the input signal appear, in which the repetition periods are equal to the selected period or less than an integer number of times.

For stable operation of the selector, the period of the following clock pulses must be at least 2 times less than the minimum duration of the input pulses.

The prohibition block 15 prohibits the passage of pulses to the output, the front is shortened from the corresponding front of the previous pulse to the output of the trigger 14 for a time interval shorter than the selected period. Therefore, if there is a pulse sequence with a pulse repetition period smaller than the selected one at the trigger output 14 the number of times at the output of block 15 of the ban signal will be absent. The counter 16 counts the number of pulses arriving at the second input of block 15 of the prohibition for a time interval equal to the selected period.

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The information from the counter 16 is rewritten by a pulse arriving at the first input of the prohibition unit 15 to the trigger 17, and then the counter 16 is reset. When the number of read pulses for the selected period is more than I, the signal from the output of the trigger 17 blocks the passage of the sequence through

match item 18

The selector ensures the selection of one periodic sequence of pulses in the presence of several input ones. Preservation of the follow-up period and the pulse duration of the selected sequence makes it possible to perform further accurate measurements of the fundamentals

time parameters pulse1

sequence, increase the accuracy and reliability of time synchronization of radio systems and allows the wide use of this selector in data transmission systems.

Claims (1)

Invention Formula A tunable selector and ffly sequences with a clock pulse generator, the output of which is connected to the counting input of the first counter, the control inputs which is connected to the control bus, and the overflow output to the first input of the inhibitor unit and the counting input of the first trigger, the direct and inverse outputs of which are connected. with the Read / Write inputs of the first and second storage devices, respectively, the information inputs of which are connected to the input bus and the nepBbiM input of the match element, the second input of which is connected to the output of the assembly element, the first and second inputs of which are connected to the outputs of the first and second memory devices, respectively moreover, the output of the prohibition unit is connected to the output bus, characterized in that, in order to preserve the time parameters of the breeding sequence, into it entered the second and third counters, the first and second odnopbrator and the second trigger, the output of which is connected to the second input of the block, and the R- and S- inputs cher and PTS: 1 (n 1 5131 one-shot corresponding to the input bus and the output of the coincidence element, and the counting inputs of the second and third counters are connected to the output of the clock pulse generator; the outputs of the bits are connected to the corresponding bits of the address inputs of the first and Editor M, Pandora Compiled by A.Sazonov Tehred M.Hodanich Order 1902/55 Circulation 902 Subscription PERSONNEL of the USSR State Committee for inventions and discoveries 13035, Moscow, Zh-35, Raupska nab., 4/5 Production and printing prescription, Uzhgorod, Proektna st., 4 10086 the second; correspondingly, devices for setting the initial state — with the output of the first counter overflow, and the control inputs, inputs, ml; cab: k; bits, respectively, with direct and inverse outputs of the first trigger. Proofreader M. Demchik