Date post: | 22-Jan-2018 |
Category: |
Engineering |
Upload: | criterion123 |
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The lower ESL is, the wider capacitive range will be.
The lower ESR is, the better noise suppression will be [12].
4
The path the noise flows inside 3-terminal capacitor is shorter than
which inside 2-terminal capacitor. That’s to say, the 3-terminal
capacitor has lower ESL and ESR [12,13].
C = 10 uF 5
With lower ESL and ESR, the 3-
terminal capacitor has wider
capacitive range and better noise
suppression than 2-terminal one [7,9]
6
Although signal must pass through the whole 3-terminal capacitor.
Nevertheless, as mentioned above, the ESR of 3-terminal capacitor
is extremely small. Thus, the loss is negligible.
Feed ThroughElectrode
GND Electrode
Signal Flow
7
For noise reduction,
one 3-terminal capacitor is even better than
(1 bead + 2 * 2-terminal capacitor )[1].
9
For noise reduction,
one 1uF 3-terminal capacitor is even better than
(4 * 0.22 uF 2-terminal capacitor )[6].
10
For noise reduction,
one 10uF 3-terminal capacitor is even better than
(22uF + 10 nF x 5pcs + 100 pF x 5pcs)[4].11
Compared to multiple capacitors, the 3-terminal capacitor
doesn’t have anti-resonance issue. Besides, the 3-terminal
capacitor can save PCB area due to less components[5,12].
12
In addition, the number of GND via is the more the better. By
doing this, the impedance of noise path can be reduced further,
which can lead to better noise suppression[7,8].
13