Method of lay-out of a multilayer PCB for circuits with triple reservation

Orlov, Pavel E.; Buichkin, Evgeniy N.; Belousov, Anton O.; Gazizov, Talgat R.

doi:10.1109/sibcon.2017.7998528

Cited by 5 publications

(3 citation statements)

References 4 publications

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“…In this paper, the authors investigated a symmetric structure with a triple MR from [25], the cross-section of which is shown in Figure 3. The structure is a four-layer PCB, the core of which is Rogers RO3010 laminate, and the pre-preg is FR-4 fiberglass.…”

Section: Structure and Materialsmentioning

confidence: 99%

“…Taking into account the nature of UWB interference, the authors in [24] revealed that the probability of failure in the reserving equipment is lower than that in the reserved one. To increase reliability by means of greater duplication and better noise reduct protective electrical circuits with a triple MR were proposed in [25]. A schematic diagr with a triple MR is presented in Figure 2b.…”

Section: Introductionmentioning

confidence: 99%

“…In [28], the efficiency of MR in the circuits of a spacecraft autonomous navigat system was evaluated. However, the above-mentioned works have not addressed assessment of the risk of disabling reserved and reserving equipment in symmetric p To increase reliability by means of greater duplication and better noise reduction, protective electrical circuits with a triple MR were proposed in [25]. A schematic diagram with a triple MR is presented in Figure 2b.…”

Section: Introductionmentioning

confidence: 99%

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Using N-Norms for Analyzing Symmetric Protective Electrical Circuits with Triple Modal Reservation

et al. 2021

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The redundancy of functional blocks and critical assemblies in radio-electronic equipment is among the most widely used techniques for increasing reliability. Complex redundant systems raise the problem of electromagnetic compatibility (EMC). Ignoring EMC requirements can lead to partial or complete REE failures. In this paper, the authors analyze a noise-protective electrical circuit with triple modal reservation (a promising type of cold redundancy). A multilayer stripline is investigated, the conductors of which are symmetrically arranged relative to two planes. On account of the strong electromagnetic coupling, this protective circuit can decompose dangerous ultra-wideband (UWB) interference received at the input of the primary or redundant circuits into unipolar pulses of lower amplitude. Using this approach, due to the symmetry of the conductors, equal decomposition efficiency could be achieved. However, the effect of UWB interference at the input of one of the conductors produces bipolar pulses at the output of the other conductors. In this paper, the authors evaluate the dangers of unipolar and bipolar decomposed pulses and use modal analysis to mathematically determine the polarities and amplitudes of the decomposed pulses at all output nodes for a pseudo-matched structure. By using the quasistatic approach with and without losses, the time responses to a trapezoidal pulse with a total duration of 60 ps, which simulates UWB interference, are obtained. To confirm the results of modal analysis and quasistatic simulation, an experimental study is performed. Using a stroboscopic oscilloscope DSA 8300, the authors obtained a transient response to a step excitation. Then, taking the derivative, the response to a trapezoidal pulse with a total duration of 140 ps was obtained. To analyze the criticality of the decomposed pulses, N-norms are used. In the general case, it is shown that the UWB interference is decomposed into four pulses of lower amplitude. At the same time, the value of each N-norm indicates its significant attenuation. For example, the amplitude of the UWB pulse acting on the input of the reserved conductor decreases by 10.31–8.93 times. Such results numerically demonstrate the high efficiency of the suggested approach when it comes to protecting equipment against UWB interference. It is also shown that the probability of dielectric breakdown and damage to electronic components in redundant circuits is lower than in a primary circuit. This is due to the fact that the value of N3 in the redundant circuit is 2.38 times less than in the primary circuit. However, the results demonstrate that arcing is highly probable both in primary and redundant circuits. Finally, aspects of symmetry/asymmetry in the problem under investigation are emphasized.

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Section: Structure and Materialsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%