A test chip for evaluating switching noise and radiated emission by I/O and core circuits

Toshio Sudo, Ken Nakano, Atsushi Nakamura, Satoru Haga

Research output: Contribution to journalArticlepeer-review

7 Citations (Scopus)


In order to evaluate the radiated emission generating from LSI chip, package, wiring pattern on a printed circuit board (PCB), a programmably controllable test chip is required as a generic noise source. A CMOS gate array was fabricated in a 0.35 um silicon process technology. Both I/O buffer circuits and internal core logic circuits were incorporated as noise generating circuits. The test chip was housed in a quad flat package (QFP) with 304 I/O pins. An evaluation board was designed to verify the functionality of the developed LSI and to measure the switching noise and the magnetic near field. The switching noise and radiated emission noise were observed by stimulating the I/O buffer circuits or internal core logic circuits. The developed test chip was confirmed to be effective to investigate the noise contribution factors at the chip/package-level, and it will be applied to study the radiation noise mechanism at a printed circuit board, or at a system-level packaging environment.

Original languageEnglish
Pages (from-to)676-680
Number of pages5
JournalIEEE International Symposium on Electromagnetic Compatibility
Publication statusPublished - 2001
Externally publishedYes

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Electrical and Electronic Engineering


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