SU511701A1 - Redundant frequency divider - Google Patents

Description

(54) RESERVATED FREQUENCY DELIVER

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The invention is not applied to devices for controlling the operation of frequency dividers, (Designed for registering failures: in binary frequency dividers, operating from a common master oscillator, and used, in particular, in redundant electronic equipment.

A redundant frequency divider is known, containing two trigger frequency dividers whose inputs are connected; to the outputs of the pulse generator. : However, the well-known frequency divider does not obiad with sufficient reliability, since it allows you to automatically select and disconnect the faulty node.

The aim of the invention is to increase the reliability of the device in operation. I To do this, two storage units and two control devices are introduced into the proposed divider, the outputs of which are connected through the storage units to the zero inputs of the frequency dividers, and to the direct and inverse outputs of the frequency dividers. The controle device contains two triggers and six epe-,

cops match, first inputs of the first; and the fourth of which are connected to the boiled outputs of the triggers of the first frequency divider, the second inputs to the inverse (outputs of the triggers of the second frequency divider, I The first inputs of the second and third elements I coincide with the direct outputs of the first frequency divider, the second inputs are to the direct outputs of the triggers 1 of the second frequency divider. At the same time, the values of the first and second elements of the match | j; tr igger - with the First input of the sixth match and the same match, and the second inputs of the fifth to the j of the sixth match elements are connected, respectively, to the outputs of the third and first I elements of the match.

The drawing shows a schematic diagram of a redundant frequency divider. It contains a pulse generator 1, trigger dividers frequency 2 and 3, control devices 4 and b, in which elements of coincidence 6-17 enter,

triggers 18–21, and storage units 22 and 23.

 In the event that both trigger points 2 and 3 are working correctly, that is, the signals on their output lines are synchronous, then at the output of the elements coincidence 8

, and 13 intermittently occur signals, CHH

aeon with direct output signals of triggers of frequency dividers 2 and Sj at the output of the elements of coincidence 6 13 "CE, siphonny with inverse output signals of triggers of frequency 2 and 3,

, These signals trigger 18 and 19; 20 and 21 are constantly held at the scientific research institute, in which, from their outputs to the inputs I of the elements, there is a match of 10 to llj. 16 and 17 prohibit signals are received and so are no signals at the output of monitoring device 4 and 5, 1 In the event of a failure of one of the trigger frequency dividers 2 and 3, the following situations are possible, the forward outputs of the triggers of one of the frequency dividers are not set “Discontinuous signal; on inverse outputs, there is a constant absence of a signal; As a result of jamming one of the triggers of frequency divider 2 at the direct outputs of the triggers, the neisps of the junction 11 is set: the signal and the inverse output a permanent absence of the signal. With this other frequency converter 3, it works normally,,. In the 1st, 2nd, 3rd clock cycles, both the third-rate frequency divider continues to operate at 1m, so the dials on the codes for the coincidence items, the triggers 18 and 19 i are very simple. They correspond to the same signal, the fault situation on the fourth cycle | Lrit, the signals at the outputs the coincidence elements 8 and 9 do not change and for this reason the signal at the output of the chriggerr 19 oth, is lost; At the output of the coincidence element T B Ilf Takt, a signal occurs, while at the I output of the element of coincidence 6 the signal does not show, as a result what the trigger 18 and in the IV Tact is thrown on him About you; A signal appears that unlocks the coincidence element 10, Now the signal from the output of the element of cooperation 8 in step V through the coincidence element Yu arrives at the output of the control device 4, to the faq; failure divider. Continuous signal is set to. the inverse outputs of the triggers of one of the frequency dividers, and the direct outputs of the post-kine signal absence.

In this case, the operation of the dividers is normal, and the failure situation occurs in the third cycle. At the same time, the signals at the outputs of the elements are not the same for 6 and 7, and hence the signal at the output of the trigger 18 is still

At the output of the coincidence element 9, in the third cycle, the signal appears, and at the output of the coincidence 8 eponent, the signal disappears, and the result is that trigger 19 transfers | Cj B this clock, unlocking the coincidence element 11. Now, from the fourth clock signal, 6 through the element; 1 match 11 arrives at the output of the control device 4, as well as identifying the fact of the failure of the depot in Anapogy “.to the device WORKS in the case of triggering one of the triggers of the other frequency divider. CvETHan at the outputs of the trigger one iksi. frequency dividers begins to boznik. by the shock frequency “In an atom case, the failure situations are possible. Nykayut respectively on the II and 111 cycles The appearance of the signal at the output of the control device 4, identifies the fact of the failure of the divider, and in both cases the over- It is prepared no later than at the beginning of the tact that goes down after the negative situation, t to the same as in the previous cases. Consequently, the failed divider will be disabled by the signal, which is possible only once, since already at the beginning of the next one following the negative situation. , the failed divider will be turned off, as a result of which the situation in which the signals for the output and output devices go through is excluded; The device gives an erroneous idea of typing the refusal of the divider only in the middle of: 4as: f ,,; when the time had not doubled, it became ticked at 53; the divider strictly cei-i hopes from the verge of 5 cycles, i.e. with the moment, then all Triggers of this divider, chrome Yespwdnegs}, are set to O or 1. 1. As an option, the possibility of occurrence is 1-. Situations, especially in multi-bit sculptors, are extremely small and equal to: P- | n-.i; C - the probability of failure of one of the treg; GeroB divider; vl is the number of divider bits. Formula of the invention. - y, . .-. , -.- fci1 A redundant frequency divider that provides two trigger signals and five frequencies, the inputs of which are connected to the output of the pulse generator, which is io 1d and so; which, in order to increase