Electricity: measuring and testing – Measuring – testing – or sensing electricity – per se – With rotor
Patent
1989-05-19
1990-08-14
Eisenzopf, Reinhard J.
Electricity: measuring and testing
Measuring, testing, or sensing electricity, per se
With rotor
371 225, G01R 3128
Patent
active
049490338
ABSTRACT:
An LSI system includes; a multi-layer print board; and a plurality of LSI circuit chips mounted on the multi-layer printed circuit board, each including a plurality of pins, a reference voltage terminal, a pin scan out terminal and a plurality of pin scan out circuits corresponding to the pins on a one-to-one basis. The multi-layer printed circuit board includes a reference voltage feeding layer formed therein in a form of a mesh or a sheet, at least one further layer overlying the reference voltage feeding layer and a plurality of through holes extending through each such further layer. By electrically connecting each reference voltage terminal of the plurality of LSI circuit chips through a corresponding through hole to the reference voltage feeding layer, a substantially equal reference voltage can be fed to each LSI and the voltage drop thereof is reduced.
REFERENCES:
patent: 4748403 (1989-05-01), Tamamura
Kono Takeshi
Yoshimura Tatsuro
Eisenzopf Reinhard J.
Fujitsu Limited
Urban Edward
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