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Noise suppression methods are introduced in each example listed on the
right. To view product details, click on any product below to go to the
"EMIFIL®" catalog page for that product.
The USB performs differential transmission of signals, and provides two
transmission modes of 1.5 Mbps and 12 Mbps. These modes are used based
on the peripheral connected. Since noise must be suppressed without
distorting the signal waveform, it is necessary to suit the noise
suppression to the transmission mode. |
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| Generally, the BLMxxB Series
(Chip Ferrite Bead) is installed on the signal lines, while the BLMxxP
Series (Chip Ferrite Bead) is installed on the power supply/GND lines.
However, if a chip ferrite bead with large impedance is used on
12Mbps-circuit signal lines, where signals are transmitted at
relatively high speeds, the signal waveform is distorted, possibly
preventing the system from operating. Therefore, when noise cannot be
suppressed using a chip ferrite bead with small impedance, the DLP3216S
Series (Chip Common Mode Choke Coil) is used. |
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