SU1238079A1 - Device for checking pulse distributor - Google Patents

Abstract

The invention relates to the field of digital computing and can be used in computers and digital systems with increased reliability of operation. A device containing a trigger, four AND elements and an OR element, n + 1 triggers are entered, where n is the number of outputs of the controlled distributor, n + 2 elements And and n-2 switches, which leads to an increase in the reliability of the control. 2 Il. co o QO

Description

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

FIG. 1 shows a functional diagram of the device; in fig. 2 - time diagrams of his work.

The device for controlling the pulse distributor (fig, 1) contains the first 1.1-1. P triggers, (n + 1) -th trigger 2, first 3.1-3. (N-2) -th switches, first 4 and () -th 5 And elements, the second 6.1-6, (P-I) -th elements And, element OR 7, the first 8.1-8. N outputs of the controlled pulse distributor - device inputs, output 9 of the signal.

Triggers 1.1-1.p designed

to memorize the fact that it receives 20 trigger 1 .. (p-1) and install one trigger on the first 8.1-8 p input of trigger 1 (Fig. 2). Next up

impulse will come to the input 8. (p-1) about the device. He will reset to the o trigger

Resolutions, respectively. They switch to the unit state when the trailing edge of the pulse arrives at the combined J and C inputs. The trigger 2 is designed to memorize the fact that a pulse arrives at the first 8.1 or 8, nth input i of the device. After a pulse arrives at input 8.1 of trigger 2, it is set to 1, and after a pulse arrives at input 8.2 to 0. Switches 3.1-3. (P-2) are used to generate reset signals for trigger 1.2-1, (p-1) respectively . Elements 4 and 5 are used to form the reset signals of the triggers 1.1 and 1, n, respectively. Elements And 6.1 - 6.P serve to form (p-2) and set to 1 trigger.

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(p-1) "etc. An impulse arriving at input 8.1 will switch trigger 2 to one state, reset trigger 1.2 and switch its trigger edge 1.1 to 1 with its back edge. In the future, the device will function similarly to that described.

If there are distortions in the controlled sequences, the device operates as follows (in the image.

Suppose that in the zero state of the trigger 2 on the input 8.2 of the device there will not be a pulse after the W-pulse at the input 8.3. This will lead (Fig. 2) that trigger 1.1 will remain in the unit

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Suppose that in the zero state of the trigger 2 on the input 8.2 of the device there will not be a pulse after the W-pulse at the input 8.3. This will lead (Fig. 2) that trigger 1.1 will remain in the unit

neither the error signal in the case of violation of the sequence of the arrival of pulses in the Q state, and the trigger 1,2 in the zero state.

on inputs 8.1 - 8.P devices. Elele Then the next impulse received

to input 8.1 of the device, pass through the open element AND 6.1 and the element OR 7 to the output 9 of the device, signaling the distortion of the monitored sequences. At the same time, this pulse will set trigger 2 to one state. In the future, the device will work similarly to the description of OR 7 to generate an error signal at the output 9 of the device, signaling the distortion of the monitored sequences.

The device works as follows.

Before starting the triggers 1.2-1, p and trigger 2 are set to one, and trigger 1.1 is set to the zero state. The circuits for the installation of the triggers 1.1-1. Paragraphs and 2} for the initial state are conventionally not shown.

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

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Nomu (in the absence of distortions of the input sequences).

In the case of a single state of flip-flop 2, a pulse does not arrive at the input 8.3 of the device after a pulse 55 at the input 8.2 (Fig. 2). This will cause the 1.4 trigger to remain in the one state, and the 1.3 trigger to the zero state. Then another impulse.

The first will be a pulse at the entrance

8.1 devices. It will pass through the switch 3.1 to the trigger reset input

1.2 and install it in O. On the back front of this pulse trigger 1.1

will be set to 1. Next, enter a pulse at the input 8.2 of the device. It will install a 1.3 on trigger and 1 a trigger on 1.2, and so on. Pulse,

received at input 8, (p-1), will install in C trigger 1.P and in 1 trigger 1. (p-1) :. The impulse received at the input 8.P, will set in O trigger 2, which will remove a single signal

from the first control inputs of switches 3.1-3. (p-2) and will send a single signal to the second control inputs of switches 3.1-3, (p-2). Single / temporary this impulse will reset to O

(p-2) and set to 1 trigger

(p-1) "etc. An impulse arriving at input 8.1 will switch trigger 2 to one state, reset trigger 1.2 and switch its trigger edge 1.1 to 1 with its back edge. In the future, the device will function as described.

If there are distortions in the controlled sequences, the device operates as follows (in the image.

Suppose that in the zero state of the trigger 2 on the input 8.2 of the device there will not be a pulse after the W-pulse at the input 8.3. This will lead (Fig. 2) that trigger 1.1 will remain in the unit

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Nomu (in the absence of distortions of the input sequences).

In the case of a single state of trigger 2, an impulse will not arrive at the input 8.3 of the device after the impulse at input 8.2 (Fig. 2). This will cause the 1.4 trigger to remain in the one state, and the 1.3 trigger to the zero state. Then another impulse.

the incoming input 8.4 of the device will pass through the open element AND 6.4 and the element OR 7 to the output 9 of the device, signaling the distortion of the monitored sequences. In the future, the device will function as described.

Consider the operation of the device when the next impulse does not arrive at the INPUT 8.1 of the device (Fig. 2). In this case, the trigger 1.4 will remain in the unit one, and the trigger 2 will remain in the zero state. Then the next pulses received in series at the inputs 8,2 - 8, n of the device will pass through the elements AND 6.2-6.p and the element OR 7 to the output 9 of the device, signaling the distortion of the controlled sequences. In doing so, the state of the triggers 1.1-t.n and 2 change. will not.

Only when a pulse arrives at the input 8.n the trigger 1 will be set to O, (n-1) (in FIG. 2, this is the input 8.4 and the trigger 1.3, respectively, since). The next impulse received at input 8. (p-1) of the device will reset trigger 1, (p-2) and set trigger 1, (p-1) to the back state by its falling edge. In the future, in the absence of distortions of the input sequences, the device will work in the same way as described (normal operation mode).

Reliability control, ensure

The device by the prototype is estimated by the probability of detecting an error and does not exceed 0.5, since, depending on the moment (tact) of the occurrence of the error, it is detected only on one of the two outputs of the controlled distributor. The proposed device provides almost complete control of the distortions of the output sequences generated by the distributor regardless of the moment (tact) of their occurrence, and therefore ensures a gain in confidence of the control in more than 2.

The proposed device has a much wider area. use, as it provides control of n-output spool distributors (n5-2),.

The use of the invention allows to significantly increase the reliability

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Claims (1)

control and expand the class of controlled pulse distributors. Invention Formula A device for controlling a pulse distributor containing the first trigger, the first, second, third and fourth elements AND and the OR, the output of the first element AND connected to the input of the first O trigger in O, the outputs of the second and third elements AND connected to the first and second inputs respectively of the OR element, the output of which is the output of a device error, is that — in order to increase the reliability of the control, n + 1 flip-flops are entered in the device, where and is the number of outputs of the controlled distributor, And cops and n-2 switches, each output of f-th ,. where, p, the controlled distributor is connected to the first input of the (+1) -th element I, with the inputs J and Ct-ro of the trigger, with the first information input of the p-th switch, where P 1, (p-2), the output of each p switch of the switch is connected to the installation input of the O-flip-flop trigger, the output of the {-th flip-flop is connected to the second input of the t-ro element I, the output of the i-th element And where, -M input element OR, the first and nth outputs of the controlled distributor are connected respectively to the installation input to 1 and the installation input to the O (n + 1) -th trigger, the unit and zero outputs of which connected to the first and second control inputs of all switches, the second and (n-1) -and outputs of the controlled distributor are connected to the first inputs of the first and (n + 2) -th elements, respectively, and the zero and single outputs (n + 1) th trigger are connected respectively with the second inputs of the first and. (n + 2) -th element And, the output of (n + 2) -th element And is connected to the input of the device in the O n-th trigger, the second. the information input of each nth switch is connected to the (p + 2) output of the controlled pulse distributor, the K input of the first trigger is connected to the zero potential bus of the device. &one “2 "3 i g tr 1.2 1.3 1L A.t 4: i A3 four( 3 Editor M. To'tin (pus.2 Compiled by I. Sigalov Tehred L. Serdyukova Proofreader M. Sharoshi Order 3293/50 Circulation 671 Subscription VNIIZH.GCCP State Committee. for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., d. A / 5 Production and printing company, Uzhgorod, st. Project, 4