| 摘要 |
PROBLEM TO BE SOLVED: To provide a printed board capable of suppressing unwanted radiation generated with an IC as a noise source, being applicable to any kind of printed board including single layer, double layer, and four-layer, at a low cost and with a simple configuration. SOLUTION: The printed board of an IC is assumed which comprises a first circuit, a plurality of pairs of first kind pair terminals consisting of a first kind of power supply terminal and first kind of GND terminal connected to it, a second circuit, and a plurality of pairs of second pair terminals consisting of a second kind of power supply terminal and second kind of GND terminal connected to it, with the pair terminals of first kind and second kind being internally separated. A printed board on which the IC is mounted is provided with an inductor on a path through which a wiring from the first kind of GND terminal is led to the second kind of GND terminal and the GND of the printed board. It comprises the part where first kind of GND terminals and other first kind of GND terminals are arranged inside the terminal array of the IC. The inductor suppresses potential fluctuation of high frequency generated by operation of the first circuit. COPYRIGHT: (C)2007,JPO&INPIT
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