SU1053340A1 - Multi-channel clock pulse former with redundancy - Google Patents

Description

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: o: o i The invention relates to automation and computer technology and can be used in the construction of highly reliable generators for generating clock pulses in multi-channel redundant systems. A redundant clock pulse generator is known, which contains in each channel a master oscillator, a frequency divider, an AND element, a trigger, a majority element, a delay element, and a single pulse ij generator. The disadvantage of this former is that during the failure of one generator in the corresponding channel, the pulses will not be generated, and if two generators fail, the clock will not be generated in all channels. In addition, in the specified former, the leading edges of the output signals may appear with a difference in time, and the magnitude of this difference can reach the value of the period of the signals of the master oscillator. The presence of such a difference often does not allow the use of such clock pulses as marks of the origin of the time loop, time interval, and m in the reserved degrees of automation: computer and computer technology. The closest to the technical essence of the invention is a reserve clock pulse shaper containing in each of the n () identical channels a master oscillator, a frequency divider, an impulse transformer, an OR gate and a single pulse shaper 2.; A disadvantage of the known body formation is that if a failure occurs in one of the driver channels, resulting in an increase in the frequency of the signals at the output of the divider / mc, an increase in the frequency of the output pulses will occur in all the channels of the driver. The aim of the invention is to increase the reliability of the driver, namely, to maintain its operability in case of failures in any of the channels that lead to an increase in the frequency: Signal frequencies at the output of the frequency divider. The goal is achieved by the fact that in a multichannel redundant clock pulse generator, containing in each channel a master oscillator connected to the input of a frequency divider, the first driver of a single pulse / pulse, the output of which is connected to the output of the channel and to the input of setting the zero frequency divider, and input with the output of the p-input element OR, each input of which is connected to the corresponding output of the pulse transformer in all AND channels, the elements AND, the element NOT and the second form are entered into each channel Tel single pulse, whose input is connected to the output of the first shaper of the channel and exit through the NOT element - to the first input elements. This AND of this channel, the output of which is connected to the primary winding of the pulse transformer, and the second input - to the output of the frequency divider of this channel. The drawing is a block diagram of a multi-channel redundant clock pulse generator. The clock pulse shaper consists of n (pg 2) identical channels # in which the master oscillator 1, the frequency divider 2, the pulse transformer 3, the OR 4 element, the first single pulse shaper 5, the And b element, the WTO single pulse shaper 7, the element NOT 8. The master oscillator 1 is connected to the input of the splitter 2 frequency. The output of the frequency divider is connected to the input of the element Ib, another input of which is connected to the output of the element 8. The output of the element I is connected to the primary winding of the pulse transformer 3, which has r-secondary windings (by the number of channels). Each of the AND-secondary windings is connected to the corresponding input of the n-input element OR (4) in all n-channels. The output of the OR element is connected to the input of the first shaper 5 of a single pulse, the output of which is connected to the output of the channel, to the input of the installation in zero of the divider and the input | second shaper 7 single pulse. The output of the driver 7 is connected to the input element NOT. The device works as follows. When the power is turned on, generator 1 is excited. Because the generator is randomly excited, first in one of the channels, for example in the first one, a signal appears at the output of divider 2 and through the element b and the pulse transformer 3 simultaneously enters the inputs of the elements OR 4 in all channels of the device. At the outputs of the OR elements of all channels, signals appear, on which the first shapers 5 of a single pulse generate clock pulses synfaeno. These pulses are simultaneously set to zero depile 2 in all channels and start the drivers 7.

A pulse appears at the output of each generator 7, which passes through the element NOT 8 and sets a low level at the input of the element 6, prohibiting the passage of signshops from the output of divider 2 to the input of the pulse transformer 3 through the element and 6.

where tJi is the pulse duration with

shaper 7; I - following the device OUTPUT clock pulses;

stumps

the minimum period of signal tracking from the output of divider 2, which may be as a result of a generator or divider 2 failure. From the moment the divider 2 is set to zero, the operation cycle of the former is repeated. The next working signal from the output of divider 2 passes through the element 6 in time. Transformer input 3, and if a generator or divider fails in the channel, causing the frequency of the signals at the output of divider 2 to increase, then the impulses at the second input And do not miss these signals to the input of the transformer 3.,

The use of the circuit allows to significantly increase the reliability of the former.

Claims (1)

MULTI-CHANNEL RESERVED TACT PULSE FORMER, containing in each channel a master oscillator connected to. 'to the input of the frequency divider, the first formal and with the installation input to zero the frequency divider, and the input with the output * of the n-input element OR, each input of which is connected to the corresponding output of the pulse transformer in all channels, which means that, In order to increase its reliability, AND elements, NOT elements, and a second driver of a single pulse are introduced into each of its channels, the input of which is connected to the output of the first driver of this channel, and the output is through. cut the element NOT to the first input of the element AND of this channel, the output of which is connected to the primary winding of the pulse transformer, and the second ® * SU 1053340