SU788056A1 - Pulse train monitoring device - Google Patents

Description

one

The invention relates to electrical measuring technology and can be used to control the passage of pulses carrying different information in a strict sequence, for example, when docking multi-functional sensors with an electronic computer.

The closest technical. Essentially, a device for controlling a sequence of pulses, comprising a driver, delay lines, riggers, an AND element, and an OR 1 element. 15

The drawbacks of this device are its complexity and low speed.

The purpose of the invention is to simplify and improve speed .20

The goal is achieved by the fact that the device containing a delay line whose output is connected to the first input of the element I, the output of which is connected to a single trigger input, the street 25 which is connected to the input of the device and to the input of the delay line is entered zero input of the trigger, and the output - with the second input of the element And, 30

FIG. 1 shows a block diagram of the device in FIG. 2 - temporary diagrams, illustrating his work.

The device contains a line 1 delay, trigger 2, the element is NOT 3 and the element And 4.

The device works as follows, at once. .

In the initial state, the trigger 2 is in the zero state, the element And 4 is closed by the inhibitory (low) potential coming from the output of the delay line 1.

Claims (1)

When a controlled pulse sequence arrives at the device input, the first pulse of this sequence arrives at the zero input of trigger 2, confirming its zero state, besides passing through delay line 1, the first pulse is delayed by time T and arrives at the corresponding input of the AND 4 element At this point, the signal from the output of the element HE 3 formed by the second pulse of the controlled sequence is prohibited by the other input of the element AND 4. As a result, at the output of the element And 4 a signal about a present and the trigger 2 remains in the initial zero state. When one or several pulses of the monitored sequence are skipped, an error signal appears at the output of trigger 2, the duration of which is equal to the number of periods of missed pulses. Example. The third, fifth and sixth pulses are absent (in Fig. 2 they are shown by dotted lines). At the moment of passing the third impulse at the output of the element HE 3, a high potential is maintained and therefore the sustained second impulse, having passed through the element 4, throws trigger 2 into one state. The fourth pulse, arriving directly at the zero input of trigger 2, restores its initial state. At the moment of passing the fifth pulse at the output of the HE 3 element, a high potential is again maintained and the delayed fourth pulse, having passed through the AND 4 element, flips trigger 2 into a single state. This state of flip-flop 2 is maintained until during the run of the seventh pulse, since in the absence of the sixth pulse the high potential is maintained at the output of the element HE 3, and there is also no signal at the output of the delay line 1 (the fifth pulse does not exist). The device has a high speed, since the error signal at its output appears without delay at the moment of passing the pulses of the controlled sequence. An apparatus for controlling a pulse sequence comprising a delay line, the output of which is connected to the first input of an element, the output of which is connected to a single trigger input, the zero input of which is connected to the input of the device and to the input of a delay line that, in order to simplify and increase speed, an element is introduced into it, NOT, the input of which is connected to the zero input of a trigger, and the output - to the second input of element I. Information sources taken into account during the examination Videelstvo USSR № 612210, cl. G 05 23/02, 1976 (prototype). and Sw.f byk.Z 3. . " PP rm n MItIILJII / I II 1G II II IL