SU1555840A2 - Pulse sequence selector - Google Patents

Abstract

The invention relates to a pulse technique and can be used in information processing devices represented by coded pulse combinations with informative parameters contained in the number of pulses of the code combination, pulse durations and interpulse distances. The pulse sequence selector contains delay elements 1 and 2, elements 3 and 4, pulse formers 5 and 6, pulse formers 7–9, triggers 10 and 11, element OR 12, input bus 13, output bus 14. Eliminating the possibility of passage The output bus of the impulse noise contained between the pulses of the desired combination allows to increase the noise immunity of the selector. 2 Il.

Description

Schig.1

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315558AO

The invention relates to a pulsed technique, can be used in information processing devices represented by coded pulse patterns with informative parameters contained in the number of pulses of a code combination, pulse durations and interpulse distances, and is an improvement of the device according to the author. St. No. 790239. The purpose of the invention is to increase the resistance to earth by eliminating the possibility of impulse noise containing j between pulses of the desired combination passing to the output bus.

FIG. Figure 1 shows the electrical structure of the device; in fig. 2 - timing diagrams for the device operation .2Q

The device contains the first 1 and second 2 delay elements, the outputs of which are connected respectively to the first and second inputs of the first element And 3, the second input of which is also connected to the 25 first input of the second element 4, and the output to the input of the first driver 5 pulses. The device also comprises a second pulse shaper 6, the input of which is connected to the output of the first shaper 7 of the falling edge of pulses, and the output - to the input of the second shaper 8 of the falling edge of pulses. The output of the element And k is connected to the input of the third shaper 9 of the trailing edge of the pulse, and the second 35 input is connected to the output of the first trigger 10. The output of the element AND 3 is connected to the S input of the trigger f1 and the first input of the element OR 12, the third input to the inputs elements 1 and 2 are delays and with input 0 bus 13. The output of element I is connected to the output bus Ik. The fourth input element And 3 is connected to the inverse output of the trigger 11, the R-input of which is connected to the output of the forming unit 8 and the second input of the element OR 12, the third input of which is connected to the output of the forming device 7 and the output to the S-input of the trigger 10, R- the input of which is connected to the output of the imager 50 9. The output of the imager 5 is connected to the input of the imager 7.

The selector works as follows.

The input pulses arrive at the And 55 element directly and through the delay elements 1 and 2, which, respectively, have reference delay times 30

0

Q

5 5 0 50

55

0

ki t, Јegi 1g Ј21 + F „, whereC, 2 is the interpulse interbal between the second and third impulses of the combination4, and Јg is the interpulse spacing between the second and the first impulses of the combination. When a combination of pulses arrives at the specified intervals at the time of the last pulse of the combination, the pulses (Fig. 2, b, c) also appear at the third input of element 3, resulting in a selection impulse at the output of element 3 (Fig. 2, d). From the leading edge of the selection pulse, trigger 11 (Fig. 2d) is triggered and at the fourth input of the element I3 the resolution level with the inverse output of trigger T1 ceases to act. Simultaneously, the selection pulse through the OR element 12 cocks the trigger 10 (Fig. 2, e) and starts the pulse shaper 5 (Fig. 2, g). From the output of the trigger 10, the resolving level at the second input of the AND element starts to operate, with the result that the first information pulse of the combination from the output of the delay element 2 passes through the first input of the AND 3 element (Fig. 2, h) to the bus 1 of the device. From the output of the element And k the pulse arrives at the input of the imaging unit 9, which generates a signal corresponding to the trailing edge of the first pulse of the combination (Fig. 2, i).

This signal returns the trigger 10 to the initial state (Fig. 2, e). In parallel with this, the pulse shaper 5 launched from CHI-nal selection generates a pulse of duration (t a - t,) (Fig. 2, f), which is fed to the input of the shaper 7. The latter forms a signal corresponding to the falling edge of the shaper of the shaper 5 (Fig 2, k), and from which the resolving level comes back to the second input of the element 4, due to which the second information pulse of the combination from the output of the delay element 2 passes through the element 4 to the device bus 1 (Fig. 2, a). Then, trigger 10 returns to its initial state. At the same time, the impulse of the imaging unit 7 starts the imaging unit of 6 pulses (Fig. 2, l), which produces an impulse of equal duration t ,,. This pulse arrives at shaper 8, which generates a signal corresponding to the trailing edge of shaper 6 (Fig. 2, m), and from which trigger 10 is raised again. As a result, element 4 transmits the third information pulse of the combination from the output of element 2 to the bus 14 selector (Fig. 2, g). At the same time, from the signal of the imaging unit 8, the trigger 11 returns to its initial state (Fig. 2, d), the IZS element opens at the fourth input with a resolving level from the inverse output of the trigger 11. In the presence of a pulse interference in the coded combination, the prohibition imposed by the trigger $ 11 per element And 3, for the entire duration of the restoration of the original coded combination, does not allow the passage of interference pulses to the bus 14 of the selector.

Claims (1)

Not 14 selectors of the original three-pulse coded combination are free of the impulse noise present in the composition of the original coded combination. Invention Formula Pulse sequence selector auth. St. No. 790239, characterized in that, in order to improve the noise immunity by eliminating the possibility of impulse noise contained in the output bus contained between the pulses of the desired combination, a second trigger is introduced into it, the S input of which is connected to the output of the first And element, R input - with the output of the second impregnator of the falling edge of the pulses, and the inverse output is thus restored to the bus 20 with the fourth input of the first element I. Yu Not 14 selectors of the original three-pulse coded combination are free of the impulse noise present in the composition of the original coded combination. Invention Formula Pulse sequence selector auth. St. No. 790239, characterized in that, in order to improve the noise immunity by eliminating the possibility of impulse noise contained in the output bus contained between the pulses of the desired combination, a second trigger is introduced into it, the S input of which is connected to the output of the first And element, R input - with the release of the second shaper front pulse, and the inverse output 20 with the fourth input of the first element I.