Before installing
the EMI filter |
 |
|
Common mode noise generated from the Video Signal IC is conducted
through the signal line and radiates from the AV cable through
the signal line and emitted from the cable. When the BLM18AG601SN1
(Chip Ferrite Bead, 600 ohms at 100 MHz) is installed on both the
video signal line and GND line, the noise level is suppressed by
approximately 3 dB.
Using a filter with a high constant may distort the video signal
waveform, deteriorating the picture quality. Attention must be paid
for correct filter selection.
Using a Common Mode Choke Coil that effectively suppresses common
mode noise without adversely affecting the signal is also effective. |
