RU1807486C - Device for inspecting pulse distributor - Google Patents

Abstract

The invention relates to digital computing and can be used in computers and digital systems with enhanced reliability. The purpose of the invention is to increase the reliability of control. The invention consists in the fact that during operation of the device the output signals of the pulse distributor are compared with the output signal of the control device. Self-monitoring of the device is carried out directly during operation of the pulse distributor and its control circuit. 2 ill.

Description

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

. The goal is to increase the reliability of control.

In FIG. 1 shows a functional diagram of the device: in FIG. 2 is a timing diagram of a device.

The device contains triggers 1 and 2, switch 3, elements And 4 and 5, information inputs 6 and 7, the first control output 8, elements And 9. 10, elements NOT 11, 12, elements AND 13, 14, element NOT 15, element AND 16, element NOT 17, element AND 18. element IL AND 19, the second control output 20.

A device for monitoring the distribution of pulses operates as follows. In the initial state, all memory elements are in the zero state. The first is a long pulse to enter

6 devices. He switches trigger 1 to a single state, closes AND element 4 and switch 3, prohibiting the formation of single signals at the outputs of these elements.

A short pulse received at input 7 in the presence of a long pulse at input 6 passes through element 5 and sets trigger 2 to unity. This pulse does not pass to the output 8 of the device through the switch 3, since the latter is closed by a long pulse from input 6. received at its control input.

If there are pulses at the inputs 6 and 7, they arrive at the first and second inputs of the And 9 element, respectively. A unit signal is generated at the output of this element. He goes to the second input of the element And 10. During normal operation of the device counter. l, the signal does not arrive at the output 8 of the device, which means that an error signal will not be generated at the output of the And 10 element. If the control device circuit is faulty, then

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a false error signal may appear at the output 8 of the monitoring device. This signal will immediately arrive at the first input of the AND element 10, and an error signal will be generated at the output of this element, which through the OR element 19 will go to the output 20 of the self-monitoring circuit.

At the end of a long pulse at the output of element And 4, a reset signal of trigger 1 is generated. Trigger 1 is returned to zero and a single signal from the inverse output resets trigger 2, as a result of which the device returns to its original state.

When the next pair of pulses arrives at inputs 6 and 7 of the device, the operation cycle repeats. If in one of the clock cycles of the device a pulse arrives at its input 6, but does not arrive at input 7, then trigger 1 will be switched along the leading edge of the long pulse, and trigger 2 will remain at zero. At the end of the pulse at input 6, trigger 1 will not return to zero, since the And 4 element will be closed by a zero signal from the direct output of trigger 2. A zero signal will arrive at the control input of switch 3, which will open switch 3, and at its output 8, an error signal will be generated in the formation of controlled sequences.

If the AND 4 element malfunctions, a False one signal may occur at its output. In this case, trigger 1 will return to zero. A single signal will arrive at the control input of switch 3, which will close switch 3 and there will be no error signal generation at its output. But at the same time, from the output of the And 4 element, the False unit signal will go to the And 16 element, From the output of the 8 monitoring device, the zero signal will go to the inverter 15. At the output of the element there will be a single signal that will go to the first input of the And 16 element, At the output of this of the element, an error signal will be generated which arrives at the element OR 19 and is apparent at the output 20 of the self-monitoring circuit. During normal operation of the And 4 element, there will be a zero signal at its output, which will go to the second input of the And 16 element and close it. At the output of element And 16 there will be a zero signal, which will notify about the normal operation of the control device, i.e. at the output 8 of the control device there will be an error signal.

When a long pulse is received at the input 6 of the control device, the formation of an error signal will stop and the device will switch to the normal operation mode, as described above.

If in one of the clock cycles there is no pulse at input 6 of the device, then a pulse, come at input 7. Through the open switch 3, it will pass to output 8 of the control device, signaling an error. Triggers 1 and 2 in this case will remain in the zero state.

The pulse received at the input 7 of the device will go to the first input of the And 21 element, and the zero signal from the input of the device 6 through the inverter NOT 17 will go to the second input of the And 21. In this case, a single signal will be generated at the output of the And 21 element to the second input of the And 18. element. During normal operation of the control circuit, an error signal is received at the output 8, which will go to the NOT element 15. At the output of this element, a zero signal is generated, which will go to the first input of the And 18. element. In this case, at the output of the element And 18 will be zero Igna, which goes to the third input of the OR gate 19. The output of this element is an error signal will not be formed.

In case of a malfunction of the control device circuit, a false zero signal may appear at the output of the device 8. This signal will go to the input of the element NOT 15. At the output of this element, a single signal will come that will go to the first input of the AND 18 element. In this case, an error signal will be generated at the output of the AND 18 element, which will go to the third input of the OR 19 element. The output of the self-monitoring circuit is an error signal.

If there are no pulses at the inputs 6 and 7 of the device, the output 8 of the device will have a zero signal. In case of abnormal operation of the control device at its output 8, in this case an error signal may appear, a false one; This signal will go to the first input of the And 14. element. From the inputs B. and 7, the zero signals will go to the inputs of the AND AND NOT 12 and NOT 11. The outputs of these elements will generate single signals that will go to the first and second inputs of the AND element. 13. At the output of this element, a single signal will be generated, which will be transmitted to the second input of the And element 14. At the output of this element, a single signal will be received, which will be received at the second input of the OR element 19, an error signal will appear at the output of this element. During normal operation of the control device, when there are no pulses at the inputs 6 and 7, the output 8 will have a zero signal, which will go to the first input of the And 14. element, and the And 14 element will be closed, and an error signal will be generated at its output HR. The effect of the device for monitoring the pulse distributor with self-monitoring is that it allows to increase the reliability of the control of the pulse distributor at any time. The pulse distributor is monitored and the device is self-monitored.

Claims (1)

SUMMARY OF THE INVENTION A device for controlling a pulse distributor comprising two And elements, two triggers and a switch, the inverse input of the first And element and a single input of the first trigger connected to the first information input of the device for connecting to the first output of the controlled distributor, the outputs of the first and second elements And are connected respectively to the zero input of the first trigger and the unit input of the second trigger, inverse. The output of the first trigger is connected to the zero input of the second trigger and inv the input of the second element And, the direct input of which is connected to the first information input of the switch and connected to the second information input of the device for connecting to the second output of the controlled distributor, the direct outputs of the first and second triggers are connected respectively to the second information input of the switch and the direct the input of the first element I. the inverse output of the second trigger is connected to the third the information input of the switch, the first and second control inputs of which are connected to the first information input of the device, the output of the switch is the first control output of the device, characterized in that, in order to increase the reliability of the control, the device further comprises from the third to the ninth AND elements, four NOT elements and an OR element, the first information input of the device being connected to the first input of the third AND element and through the first and second elements NOT with the first inputs of the fourth and of the elements And, the second information input of the device is connected to the second inputs of the third and fifth elements And and through the third element is NOT to the second input of the fourth element And, the output of the third element And is connected to the first input of the sixth element And, the outputs of the fourth, fifth and first elements And are connected to the first inputs of the seventh, eighth and ninth elements And, respectively, the output of the switch is connected to the second inputs of the sixth and seventh elements And and through the fourth element NOT to the second inputs of the eighth and ninth elements And , the outputs of the sixth, seventh, eighth, ninth AND elements are connected to the inputs of the OR element, the output of which is the second control output of the device. b oI Q -By H