SU1443154A1 - Pulse monitoring device - Google Patents

Abstract

The device can be used in computers and digital systems with increased reliability of operation. The purpose of the invention is to increase the reliability of the device by simplifying. The device contains the first 1, second 2 elements OR, the element IZ, the element 4 delays, the first 5 and the second 6 triggers, the one-shot 7, the input buses 8, 9, 10 and the output bus 11. The device allows to detect failures in the pulse sequences coming on the input buses 8 and 9, which appear in the form of the disappearance of successive impulses or the resulting extra impulses. 2 Il.

Description

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

The purpose of the invention is to increase the reliability of the device by simplifying.

Figure 1 shows the functional diagram of the device; Fig, 2 - time diagrams of the device,

The device for controlling pulses (Fig. 1) contains the first 1, second 2 OR elements, And 3 element, Delay Element D, the first 5 and second 6 triggers, the one-shot 7, the input buses 8-10, and the output bus 11. The symbols in FIG. 2 correspond to the symbols adopted in FIG. 1 and indicate the outputs of the elements.

The first 8 and second 9 input bus devices are connected respectively to the inputs of the first trigger 5, as well as to the inputs of the first element OR 1, the output of which is connected to the input of the delay element 4. The output of the first trigger 5 is connected to the output of the one-oscillator 7, the output of which is connected to the first input of the second element OR 2, the second input of which is connected to the bus 10 of the initial installation of the device. The output of the second element OR-2 is connected to the R-input of the second trigger 6, the S-input of which is connected to the output of the delay element 4, and the output to the first input of the AND 3 element, the second input of which is connected to the output of the delay element 4, and the output from output bus 1 1 device.

The one-shot 7 serves to generate a pulse for setting the second trigger 6 to the zero state when switching the first trigger 5, the one-vibration 7 generates pulses along the leading and falling edges of the signals and the output of the second trigger 5. The pulse duration generated by the one-oscillator 7 is chosen to be minimal. length, ensuring reliable zeroing of the second trigger 6. The device for controlling pulses works as follows.

Before starting the operation, the bus 10 of the device is given a signal of the initial setting, through which the second trigger 6 is set to the zero state. The state of the first trigger 5 is arbitrary.

The first input pulse arriving on the bus 8 or on the bus 9 of the device passes through the first element OR 1 and the delay element 4 to the S input of the second trigger 6, which transitions to a logical state on the falling edge of the incoming pulse

If the trigger 5 is switched from the first input pulse, the one-shot 7 generates a pulse confirming that the second trigger 6 is set to the zero state before the pulse arrives at its S input. When a pulse arrives on the second bus of the device, i.e. during normal operation, this pulse transfers the first trigger 5 to another fixed state, the second trigger 6 pulses from the single vibrator 7 to the zero state, and the second trigger 6 when the pulse from the output of delay element 4 arrives at the S input again logical 1

Thus, in the absence of distortions in the input pulses (skipping or the appearance of an excess pulse), the state of the second trigger 6 is changed so that there is no signal on the output bus 11.

If one of the pulses disappears (or an extra one appears), then the first trigger 5 remains in some fixed state, while the second trigger 6 after the first pulse prepares an IZ element for operation, and after the second pulse it is not reset to zero, with the result that the second pulse passes through the element And 3 on the output bus. 11 devices in the form of a signal failure.

Claims (1)

Invention Formula A device for controlling pulses, containing the first and second OR elements, the delay element, the first trigger and the one-shot, the first and second inputs of the first OR element are connected respectively to the first and second input buses of the device and to the inputs of the first trigger, and the output to the input of the element delay, the output of the first trigger is connected to the input of the one-shot, the output of which is connected to the first input of the second OR element, the second input of which is connected to the bus of the initial installation of the device, characterized in that, in order to increase reliability, an element And and a second trigger are introduced into it, the R-input of which is connected to the output of the second element OR, the S-input - from 8 the course of the delay element, and the output with the first input of the element I, the second input of which is connected to the output of the delay element, and the output with the output bus of the device. but Phage. 2