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參數(shù)資料
| 型號： | UPD63210LGT |
| 廠商： | NEC Corp. |
| 英文描述： | 16-BIT D/A CONVERTER WITH BUILT-IN DIGITAL FILTER FOR AUDIO |
| 中文描述： | 16位D /一個內(nèi)置轉換器，在數(shù)字的音頻過濾器 |
| 文件頁數(shù)： | 10/18頁 |
| 文件大?。?/td> | 141K |
| 代理商： | UPD63210LGT |
μ
PD63210, 63210L
10
3.3 Digital Filter
The 8-times oversampling FIR digital filter is used to attenuate the image out of band noise component, thus
facilitating the analog filter designing.
The configuration of the digital filter is shown in Figure 3-5. The characteristics of the digital filter are shown
in Figures 3-6 and 3-7.
Figure 3-5. Configuration of Digital Filter
Figure 3-6. Frequency Characteristics of Digital Filter
Figure 3-7. Intraband Ripple Characteristics of Digital Filter
1st 127th FIR filter
2nd 23rd FIR filter
3rd 11th FIR filter
fs
2fs
4fs
8fs
(Input)
(Output)
0
0.0625 0.125 0.1875
0.25
0.3125 0.375 0.4375
0.5
Frequency (f
S
)
0.005
0
–0.005
G
0
1
2
3
4
5
6
7
8
Frequency (f
S
)
0
–40
–80
–120
G
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