SU1691938A1 - Pulse sequence discriminator - Google Patents

Abstract

The invention relates to radio engineering and pulse technology and can be used in radio engineering devices for various purposes, in particular in the technique of analyzing the measurement of parameters of regular pulse sequences. The purpose of the invention is to increase the reliability of selection by allowing the selection of a given pulse sequence not only by the pulse following period, but also by the amplitude and duration of the pulses - achieved by introducing block 4 of the amplitude comparison, fourth and fifth delay blocks 7 and 8, and key element 10. 2 silt

Description

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The invention relates to radio engineering and pulse technology and can be used in radio engineering devices for various purposes, in particular in the technique of analyzing the measurement of parameters of regular pulse sequences.

The purpose of the invention is to increase the reliability of selection by allowing the selection of a given pulse sequence not only in the pulse following period, but also in the amplitude and duration of the pulses.

FIG. Figure 1 shows the electrical structure of the pulse sequence selector; in fig. 2 - time diagrams that show his work.

The pulse sequence selector (Fig. 1) contains an input pulse shaper 1, the first and second outputs of which are connected to the inputs of the first and second blocks 2 and 3 of the delay, respectively, the outputs of which are connected respectively to the first and second amplitude comparison unit 4. The device also comprises a third delay unit 5, the input of which is connected to the output of the element 6, the fourth 7 and the fifth 8 delay blocks. The output of the delay unit 5 is connected to the first input of the trigger 9, the output of the delay unit 7 is connected to the first input of the key element 10, the output of which is connected to the output bus 11. The input of the driver 1 is connected to the input of the delay unit 7 and the input bus 12. The first input of the And 6 element connected to the output of the amplitude comparison unit 4, the second input through the delay unit 8

- with a block 2 output delay, the third input

-with the second output of the driver 1, and the output with the second input of the trigger 9, the output of which is connected to the second input of the key element 10.

The pulse sequence selector works as follows.

The total pulse stream (Fig. 2, a) from the bus 12 is fed to the input of the fourth delay unit 7 and to the input of the input driver 1, from the first output of which impulses are generated, formed in accordance with the leading edges of the input pulses (Fig. 2, b), and from the second output - in accordance with the falling edges (Fig, 2, c). The pulses from the first output of the imaging unit 1 are delayed in the first block 2 of the delay for the time, which can be selected by adjusting the delay time of the block 2 and is set equal to the duration of the pulses that must be selected from the input stream. The pulses detained in block 2 (Fig. 2, d) are fed to the first input of block 4 of the amplitude comparison. The second input unit; - 4 receives pulses from the second output of the imaging unit 1, which are delayed in the second unit 3 of the delay (Fig. 2, e) for a time that can

be selected by adjusting the delay time of block 3 and is set equal to the period of the pulses to be selected from the input stream. At the output of Amplitude Comparison Unit 4, pulses appear only if pulses with the same amplitude simultaneously arrive at its first and second inputs. Thus, the selection of periodic

5 pulses in amplitude by comparing the amplitude of adjacent periodic pulses. The pulses from the output of block 4 (Fig. 2, e) arrive at the first input of element 6, the third input of which receives impulses from the second output of shaper 1 (Fig. 2, c), and the second input — pulses from the first output of shaper 1, the delays delayed in the first block 2 and the delay block in the fifth block 8 (FIG. 2, g). Block delay time

5 8 is set equal to the delay time of block 3. Pulses at the output of element AND 6 (FIG. 2, h) appear only if all its three inputs simultaneously receive pulses. This is only possible in

In the event that pulses are received at the input of imager 1, the duration of which is equal to the delay time of block 2, the follow-up period is equal to the delay time 3, and if the amplitudes of the neighboring 5 pulses are equal. The pulses from the output of the element 6 (Fig. 2, h) are fed to the second input of the trigger 9 and translate it into a single state. The same pulses arrive at the first input of the trigger through the third block 5

0, a delay (FIG. 2) and a trigger 9 are switched to the zero state. The delay time of block 5 is set equal to the delay time of block 2. As a result, pulses (Fig. 2, k) appear at the output of trigger 9, the duration of which is equal to the delay time of block 2. Pulses from the output of trigger 9 arrive at the second input of the key element 10 the first input of which receives the total pulse flow delayed in the fourth block 7 of the delay

0 (FIG. 2) for the time that can be selected by adjusting the delay time of block 7 and is set to the sum of the delay time of blocks 2 and 3. Gating takes place in key element 10

5 total impulse flow pulses coming from the trigger 9. As a result, only pulses pass to the selector bus 11 (Fig. 2, m), the duration of which is equal to the delay time of block 2, period

following is equal to the delay time of block 3 and with the same amplitude of adjacent pulses. Thus, selection is carried out according to three parameters: the pulse duration, the period of their following, and the amplitude. If one of these parameters is different from the specified one, then such a sequence does not pass to the bus 11.

Claims (1)

Invention Formula The pulse sequence selector containing the input pulse shaper, whose input is connected to the input bus and the first output to the input of the first delay unit, the second delay unit, And element whose output through the third delay unit is connected to the first trigger input, as well as the output bus, characterized in that, in order to increase the reliability of the selection by allowing the selection of a given pulse sequence, 5 only by the period of following the pulses, but also by the amplitude and duration of the pulses, the amplitude comparison unit, the fourth and fifth delay blocks and the key element whose output is connected to the output bus, the first input through the fourth delay block — with the input bus and the second input - with the trigger output, the second input of which is connected to the output of the element I, the first input of which is connected 5 with the output of the amplitude comparison unit, the first input of which is connected to the output of the first delay unit, the third input with the second output of the input pulse shaper and through the second delay unit with the second 0 input block comparison amplitudes.