| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an isolation circuit perfectly separating the ground with one electronic circuit component connected thereto from the ground with the other electronic circuit component connected thereto in transmitting a signal in a high-frequency region, and transmitting not only the signal in the high-frequency region but also a signal in a low-frequency region. Ž<P>SOLUTION: An analog-digital converter 110 and an FPGA 120 are mounted on a board 10. This isolation circuit 1 is formed between the analog-digital converter 110 and the FPGA 120. The isolation circuit 1 is used for electrically separating separate ground layers 11, 12 from each other, and includes a transformer 2 and ferrite beads 3-1, 3-2. The transformer 2 is used for transmitting only a high-frequency digital signal, and the ferrite beads 3-1, 3-2 are used for transmitting only a low-frequency digital signal. Ž<P>COPYRIGHT: (C)2010,JPO&INPIT Ž
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