The oscillator circuit generates high-level noise. Because large currents
flow even when the length of the PCB pattern is short, current is
suppressed by installing the BLM Series (Chip Ferrite Bead) in the
oscillator circuit output. When necessary, a capacitor type EMI filter
is used in combination, such as the NFM21C Series (Chip Solid "EMIFIL®").
In some cases, the oscillator circuit is connected to GND through
the chip ferrite bead. In these cases, careful attention must be paid
to equipment operation. |
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