SU1244666A1 - Device for checking two pulse sequences - Google Patents

Abstract

The invention relates to the field of digital optical technology and can be used in computers and digital systems with increased reliability of operation. A distinctive feature of the device is the control of bursts of pulses. The aim of the invention is to enhance the functionality by providing control of periodic bursts of pulses. The goal is achieved by introducing two counters, two elements NOT, two elements I. 3 Il. ISD 4 4 s: O5 o

Description

The invention relates to digital computing and can be used in computers and digital systems with increased reliability of operation.

The aim of the invention is to enhance the functionality by providing control of periodic bursts of pulses.

Figure 1 shows the functional diagram of the device; in Fig.2 and 3 -. timing charts of the device.

The device contains counters 1 and 2, the selector 3, the elements And 4 and 5, one-shot 6 and 7, the input 8 of the first controlled sequence, the input 9 of the second controlled sequence, the output 10 of the device, the elements 11 and 12.

In Figures 2 and 3, the numbers of the signals correspond to the numbers of the elements at the output of which the corresponding signals are formed.

The device works as follows.

The initial state of the counters 1 and 2 is determined by which one. a) a pulse packet arrives first. If the monitored sequences are formed so that the first pulses to input 8 are received, then counter 1 is set to zero, and counter 2 to one (i.e., there is a single signal at its output). Otherwise, the installation of counters 1. And 2 is opposite. The installation circuit of the counters 1 and 2 in the initial state; in figure 1, conventionally not shown.

The operation of the device when the input sequences are formed without distortion.

The pulses arriving at the input 8 of the device pass through the element I 4 to the input of the counter 1 and successively switch it to the first nth state, where n is the number of pulses in the packet. After the arrival of the nth pulse at the output of counter 1, a single signal appears, which closes through element 11 of element 11 and enters the input of one-shot 7. The latter forms a pulse at the reset input of counter 2 and sets it to its initial state.

After that, n pulses arrive at the input 9 of the device, which are counted by counter 2. After

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When a nth pulse is outputted at the output of counter 2, a single signal appears, which prohibits the further arrival of pulses at its counting input. According to this signal, the one-shot 6 produces a reset signal of the counter 1 and sets it to its initial state. After this, the cycle of operation of the device is repeated.

The operation of the device is in the presence of distortions in controlled ovities.

Figure 2 presents the timing diagram of the device when the number of pulses in one of the packs received at the input 8 of the device exceeds the specified () and is four. In this case, the device operates as follows.

At the end of the third pulse, a single signal appears at the output of counter 1, which prohibits the passage of pulses to its counting input and returns counter 2 to its initial state. In addition, a single signal from the output of counter 1 is fed to the first control input of the selector 3 The next fourth pulse received at the input 8, through the switch 3, passes to the output 10 of the device, signaling error 13 to form controlled sequences. In the future, the device works in the same way as described.

Fig. 3 shows the time diagram of the device operation, when .- the number of pulses in one of the packs received at the device input 9 is less than a given () and two, - In this case, the device works as follows.

After the arrival of two pulses, a single signal does not appear at input 9 of the device at the output of counter 2, and counter 1 is not reset to the initial state, element 4 is closed with a single signal from output of counter 1. As a result, all the pulses of the packet arrived after this to input 8, pass through selector 3 to output 10 of the device, signaling a distortion of the control-ipyeMbDi sequences. After that, the first pulse received at the input 9 of the device transfers the counter 2 to the unit state. As a result, counter 1 returns to its initial state, element 5 and closes, and the next two packets of the packet received at input 9 pass through the selector 3 to output 10 of the device. Further, if there is no distortion in the next burst of pulses received at the input 8 of the device, the device functions as in normal mode.

Claims (1)

Invention Formula A device for controlling two pulse sequences containing d: va one-shot, a selector, the input of the first controlled sequence of the device connected to the first information input of the selector, the second information input of which is connected to the input of the second controlled sequence of the device, characterized in that extending the functionality by ensuring the monitoring of periodic bursts of pulses, two counters, two NOT elements, two AND elements are entered into the device, and g of the first controlled sequence 4666  , - ten 15 20 25 The device connects to the first input of the first element I, the output of which is connected to the counting input of the first counter, the overflow output of which is connected to the first control input of the selector, to the input of the first one-vibrator and to the input of the first element HE, the output of which is connected to the second input of the first element NOT; the output of which is connected to the second input of the first element I, the input of the second controlled sequence of the device com, is inna with the first input of the second element I, the output of which is connected to the counting input of the second counter a, the overflow code of which is connected to the input of the second one-shot, with the second control to the selector input of the selector and to the input of the second element HE, the output of which is connected to the second input of the second element AND, the output of the first one-shot is connected to the reset input of the second counter the reset input is the first counter, the output of the selector is the output of a device error. fffloetycft uMny / fitccf GLEL n П r; 9 Alp1 ABOUT"..,: --- - 9 P ™ „.1. ten A / fofMHIflU Uf4NYILC  9 I / About „..,: f --- - 9 f