Device selection periodic pulses

 

(57) Abstract:

The invention relates to electrical engineering and can be used in devices analysis and measurements of parameters of regular pulse sequences. The technical result of the invention is to improve the reliability of the separation of the total pulse flow formed by a regular pulse sequences and random pulses. The device has an input shaper, the first, second and third elements of the delay element And an adder, multilevel amplitude selector switch, RS-trigger and key. To highlight the sequence along with the informative parameters such as the repetition period and pulse width is used and the pulse amplitude. 2 Il.

The proposed device relates to electronics, and more particularly to a pulse technique, and can be used for breeding regular pulse sequences and measurement of their parameters.

The known device allocation periodic pulse signals based on the time parameters of the analyzed sequence (see U.S. patent N 3922676, French patent N 2161400, ed. mon. N 330472, 477531, 1765885).

The disadvantage of the prototype is the low reliability of detecting periodic pulse sequence, due to the fact that the selection of this sequence are only two informative parameter, namely the pulse duration and repetition period, and does not use such an informative parameter, as the pulse amplitude. This leads to the fact that a periodic sequence of pulses with the same duration and periods of the pulse, but different amplitudes of these pulses cannot be separated. In addition, the amplitude selected in the prototype pulse is equal to the potential level at the output of the trigger and it does not correspond to the amplitude of the input pulses. This may complicate subsequent processing of the selected pulses.

The objective of the invention is to improve the reliability of detecting the specified sequence of pulses.

This objective is achieved in that in the device selection periodic pulses in the waveguide. mon. N 1765885 containing the input shaper, the input of which is connected to the input bus, a first output connected to the first to the second driver, the second delay element, the output of which is connected to the R input of the flip-flop, and a third delay element, advanced key is entered and connected in series adder, multilevel amplitude selector and switch, the output of which is connected to the S-input of the trigger, and the trigger output - with the control input of the key, the first input of the adder coupled to the output element And the input of the second delay element, the second input with the first output driver, the input connected to the input of the third delay element and the output through the key - output bus.

Structural diagram of the device shown in Fig. 1, where the following notation: 1 - input shaper, 2 - first delay element, 3 - element And 4 - second delay element, 5 - adder 6 is the third delay element, 7 - multilevel amplitude selector, 8 - switch, 9 - RS-flip-flop, 10 - key. When this input bus is connected to the input of the third delay element 6 and the input shaper 1, the first output of which is connected to the first input element And 3 and with a second input of the adder 5. The second output of the input driver 1 is connected to the input of the second delay element 2, the output of which is connected to a second input alimentatore connected to the R input of the trigger 9, and the trigger output is connected to the control input of the key 10. The output of the third delay element 6 through the key 10 is connected to the output bus. The output of the adder 5 is connected to the input of a series-connected multi-level amplitude selector 7 and the switch 8, the output of which is connected to the S-input of the trigger 9. In Fig. 2 shows time diagrams explaining the principle of the proposed device. Device selection the periodic pulses is as follows. Input pulse sequence (Fig. 2A) is applied to the input shaper 1 and the third delay element 6. The first output of the input shaper 1 pulses of constant duration tfproportional to the amplitude of the input pulses and their corresponding rear fronts (Fig. 26), served on the first input element And 3 and the second input of the adder 5, and the second output - similar pulses corresponding to the leading edge (Fig. 2B). The pulses from the second output driver 1 is delayed in the first delay element 2 at a time equal to the sum of a given repetition period Tandand pulse duration tandallocated sequence (Fig. 2G), and fed to the second input element And 3. In moments BP is enta And 3 pass the pulses from the two sequences with the same periods following Tandand duration of tandbut with a different amplitude. In the prototype of such a sequence is not split. The proposed device, the pulses from the output element And 3 are received at the first input of the adder 5, to the second input of the adder receives the pulses from the first output driver 1. Thus, in the adder 5 is the sum of the pulses presented in the diagrams (Fig. 2D, Fig. 2B). At the output of the adder 5 appears pulses (Fig. 2ZH), which carry information not only about the period and pulse duration, but also on the amplitudes of the input pulses. These pulses are fed to the input multi-level amplitude selector 7 and depending on the total amplitude divided by level (Fig. 2H). Each channel of the selector transmits on its output pulse only when the total amplitude Uandlies in the interval of amplitudes of the channel Umin< Uand< Umax. Switch 8 allows you to connect to the S-input of the trigger 9 any level (channel) multi-level amplitude selector 7. In the presence of pulses at a certain level, for example level k, (Fig. 2i) these impulses with their front front set trigger 9 in one state. In the zero SOA on time, equal to the duration of tandpulse (Fig. 2K). Thus, at the output of the trigger 9 in this case, the pulses appear (Fig. 2l), served on the control input key 10. The output of the third delay element 6 pulses appear delayed for a time equal to the sum of the repetition period and pulse duration (Fig. 2m), served on the key 10 and at its output a periodic sequence (Fig. 2n) When connected through the switch 8 to the input of the trigger 9 another channel, for example n, it is set in one state other pulses (Fig. 2P), and, consequently, its output control pulses appear at other points in time (Fig. 2P). On the output device in this case undergoes a periodic sequence of pulses with different amplitude (Fig. 2C).

Thus, the use of the proposed device is additionally introduced key, adder, multilevel amplitude selector and switch, connected, as noted above in the description of the invention, with elements of the prototype, can be used for the allocation sequence three informative parameter, namely the period, duration and amplitude of the pulse, and, sledovatelya remains equal to the amplitude of the input pulses.

Device selection periodic pulses containing the input shaper pulses, an input connected to the input bus, the first output driver pulses, which pulses of constant duration proportional to the amplitude of the input pulses at the moments corresponding to the rear edge of the input pulses, connected to the first input element And the second output of the input shaper pulses, which are formed similar to the pulses at the moments corresponding to the leading edge of the input pulses, is connected to the input of the first delay element, the output of which is connected with the second input element And the second delay element, the output of which is connected to the R input of the trigger, and the third delay element, characterized in that it introduced the key and connected in series adder, multilevel amplitude selector and switch, the output of which is connected to the S-input of the trigger, and the trigger output - with the control input of the key, the first input of the adder coupled to the output element And the input of the second delay element, the second input of the adder is connected to the first output of the pulse shaper, an input connected to the input of the third element time delay

 

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