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Components, Emission Reduction Techniques, and Noise Immunity
Published in David A. Weston, Electromagnetic Compatibility, 2017
Choice of the correct value of decoupling capacitor is important both in reducing supply and return-line noise voltage and in reducing radiation from the supply and return connections. Consider a case where the combined inductance of the supply and return tracks is 100 nH and the combined series resistance is 10 mΩ. Two TTL gates are connected at the end of the supply and return connections. The following table shows the influence of the decoupling capacitor on the magnitude of a 5-ns current pulse, iS/R, and of a 5-ns negative voltage spike, vS/R, on the supply and return connections that is generated by the TTL gates changing states at the same time:
Simultaneous switching noise mitigation in high speed pcb using novel planar EBG structure
Published in International Journal of Electronics, 2023
When numerous output drivers switch at the same time, simultaneous switching noise (SSN), impedance mismatch, and other electromagnetic interference issues emerge. This must be minimised or controlled. Ground bounce noise (GBN) on the plane layers (power and ground) is becoming a challenging factor with high-speed microprocessors. Some fundamental strategies, such as adding a decoupling capacitor, may be used to prevent noise, but are only effective at low frequencies.
Review of battery powered embedded systems design for mission-critical low-power applications
Published in International Journal of Electronics, 2018
Matthew Malewski, David M. J. Cowell, Steven Freear
Every IC should have a decoupling capacitor placed near its pins. This helps to limit the impact of an IC on neighbouring or global components. Failure to properly maintain stable voltage rails can lead to problems, such as false write in EEPROMs, which are usually the result of noise in the ground and/or voltage rails (Greenliant, 2016).