SU1198519A1 - Device for summing pulses - Google Patents

Abstract

A DEVICE FOR ADDING PULSES, containing a trigger and an OR element, indicated by the fact that, in order to expand the functional capabilities by summing up both positive and negative pulses, it contains two implication elements, two delay elements, two elements, the first the device input is connected to the inverse input of the first implication element and the direct input of the second implication element, and the second vhrd device is connected to the direct input of the first implication element and the inverse input of the second element The implication point, the output of which is connected to the first input of the first element OR NOT and through the first delay element - to the zero input of the trigger, whose single input is connected through the second delay element to the output of the first implication element and to the first input of the second element OR NOT; the second input is connected to the forward output of the trigger, the inverse output of which is under (L is connected to the second input of the first element ILINN1E, whose input is connected to the first input of the ISh element; the second input is connected to the output of the first element and the output of the OR element is the output of the device. with c eat; o

Description

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The invention relates to a pulse technique and is intended to isolate positive or negative pulses alternating at the inputs and to add up the number of events concluded in a change of input through which another pulse arrives.

The purpose of the invention is to expand the functionality by summing both positive and negative impulses.

Figure 1 shows the functional diagram of the device; 2-4 are timing diagrams explaining the operation of the device.

The device contains elements 1 and 2 of implication, elements 3 and 4 of holding, .RS-trigger 5, elements ILICH1E 6 .and 7, element OR 8.

Figure 2 shows the timing diagram under the action of positive "pulses at the input of the device in Fig. 3 - under the action of negative pulses and figure 4 - under the action of both positive and negative pulses.

The time diagrams on the x-axis indicate the time, the axes of the time diagrams show the input and levels. output signals for each element of the device.

Under the action of positive pulses, the device works as follows.

Suppose that the RS flip-flop 5 1 is in the zero state, i.e. At the direct output of the trigger 5, there is a signal o and the device inputs signals in accordance with the timing diagram (figure 2).

The first positive impulse from the first input goes to the inversion input of implication element 1 and the direct input of implication element 2. Since the value of the signal at the inverse input of the implication element is zero, the pulse passes only through the implication element 1 and, as a result, the signal 1 appears at the output of the OR 8 element for a time that is equal to the delay time of the delay element 3. After this time interval has elapsed, the trigger 5 is switched to the one state. The next impulse that arrives at the inverse input of element 1 of the implication will not be

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to generate pulses at the output of the element OR 8, since the signal from the trigger 5 blocks the passage of pulses through the element OR-BE 6.

5 When a first pulse appears at the second input, a pulse is formed at the output of the element OR 8, which is the device output. As a result, the trigger 5

The fO switches to the zero state and thereby blocks the passage of pulses through the second input of the device. Following a pulse, the output of the device is formed at

15 the appearance of a positive pulse at the first input of the device. Thus, alternating positive impulses are selected and summed.

20 Under the action of negative pulses, the device operates as follows.

Let's say trigger 5 is in

25 and the inputs to the device receive signals in accordance with the timing diagram (Fig. 3). The first two negative impulses arriving at the first

, the input of the device does not pass to the output of the device, because the trigger 5 is in the zero state, and the pulses appear at the output of the element 2 due to the presence of a potential signal equal to 1,

 at the second input of the device. The first negative pulse at the second input of the device generates an output pulse. This happens in the following way. The impulse from the second input passes through the impingement I to the input of the OR-NOT 6 circuit. Since at the second input there is a signal, then the output of the ILICH1E 6 element is followed by a signal

 which through the element OR 8 enters the output device. Dip-t, the strength of this signal is determined by the delay time of the 3-delay element. After this time, the trigger 5 is switched to the one state. As a result, blocking of the passage of pulses through the IPIN-III 6 element occurs and a signal appears to permit the passage of pulses through

55 element OR NOT 7, i.e. The device is ready to receive signals at the first input. In the future, the operation of the device is similar.

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Thus, alternating pulses of negative polarity are extracted and summed.

Under the action of positive and negative pulses, the device operates as follows.

Suppose the RS flip-flop 5 is in the zero state and signals are received at the input of the device in accordance with the timing diagram (Fig. 4).

A positive pulse at the first input of the device generates a pulse at the output of the device. Trigger 5 switches to single. A spinning impulse through the same input no longer passes to the output of the device, and only when a positive impulse appears at the second input of the device, the trigger 5 is switched and a pulse is generated at the output of the device. The next pulse at the second input of the device will be blocked. In accordance with the diagram in FIG. 4, two pulses appear alternately at the first and second inputs.

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respectively. As a result, two more pulses form at the output. Then there is a change in the shape of the input pulses. At the first input, a potential signal of a single level appears. The device perceives this change as an action of a positive polarity pulse and a pulse is generated at the output. Thereafter, a potential signal 1 is established at the second input of the device.

At this level of signals at the inputs of the device, the impi- cation element 2 passes pulsed signals that appear at the first input, and element 1 passes signals that appear at the second input. The occurrence of a negative pulse at the first input causes the trigger 5 to be set to the zero state and to form an output pulse. Further, the operation of the device is similar to that indicated for the variant with input negative pulses.

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Claims (1)

DEVICE FOR SUMMING PULSES, containing a trigger and an OR element, characterized in that, in order to expand the functionality by summing both positive and negative impulses, it is connected to the inverse input of the first implication element and the direct input of the second an implication element, and the second input of the device is connected to the direct input of the first implication element and the inverse input of the second implication element, the output of which is connected to the first input of the first element OR — NOT and through the first element t delay - with a zero input of the trigger, a single input of which is connected through the second delay element with the output of the first implication element and with the first input of the second element OR-HE, the second input of which is connected to the direct output of the trigger, the inverse output of which is connected to the second input of the first element OR -HE whose output is connected to the first input of the element OR * whose second input is connected to SU .. „1198519> eleven