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http://dx.doi.org/10.5515/KJKIEES.2013.24.2.152

Power Noise Suppression Methods Using Bead with Spiral Resonator  

Chung, Tong-Ho (Department of Electrical and Electronic Engineering, Yonsei University)
Kang, Hee-Do (Department of Electrical and Electronic Engineering, Yonsei University)
Yook, Jong-Gwan (Department of Electrical and Electronic Engineering, Yonsei University)
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Abstract
In this paper, to the aim of wideband SSN(Simultaneous Switching Noise) suppression characteristic, investigation of spiral resonator are used in conjunction with bead which is commonly used for noise suppression method. Bead works effectively to suppress the power noise up to the first harmonic of fundamental frequency, 0.8 GHz, and spiral resonator suppress noise well in the frequency range of SRF(Self Resonance Frequency) which is inversely proportional to the length of spiral. Thus, when bead used in conjunction with a spiral the noise suppression characteristic is determined by the one of higher impedance element of the two in the frequency range and achieves more broadband filtering characteristic. The case for using 22 nH bead turns out 4.8, 2.0, 0, and, 0.6 dB, and the case for using 22 nH bead in conjunction with 3-turns spiral achieves more wideband characteristic of 9.5, 8.3, 6.1, and 9.9 dB power noise suppression performances at the first, second, third, and fourth harmonics, respectively. The peak-to-peak voltage levels decrease from 76 mV to 56 mV using 22 nH bead, and the level decrease rapidly to 34 mV when using in conjunction with bead and 3-turn spiral. Thus more wideband SSN suppression characteristic can be achieved using bead with spiral.
Keywords
Bead; Inductance; Power Integrity; Spiral Resonator; Self Resonance Frequency;
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