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參數(shù)資料
| 型號(hào)： | TC9470FN |
| 廠商： | Toshiba Corporation |
| 英文描述： | ?-? Modulation DA Converter with Built-in 8-Times Oversampling Digital Filter/Dynamic Digital Bass Boost/Analog Filter |
| 中文描述： | ？ - ？調(diào)制DA轉(zhuǎn)換器與內(nèi)置8時(shí)報(bào)采樣數(shù)字濾波器/動(dòng)態(tài)低音增強(qiáng)數(shù)字/模擬濾波器 |
| 文件頁數(shù)： | 6/20頁 |
| 文件大?。?/td> | 264K |
| 代理商： | TC9470FN |
TC9470FN
2002-02-27
6
3. Digital Filter
The 8-times oversampling IIR digital filter eliminates the noise returned from outside the bandwidth
during standard operations.
Table 1 Basic Characteristics of Digital Filter
Set Mode
Passband Ripple
Transient Bandwidth
Attenuation
Standard operations
±0.11dB
20 k to 24.1 kHz
26dB or less
The characteristics of the digital filter frequencies are shown below.
4. De-Emphasis Filter
ON/OFF is controlled in the parallel mode (
This is set in the serial mode (
microcontroller setting mode for further details on serial mode settings.)
S
P/
= “H”) with the SHIFT (EMP) pin (pin
1
9).
P/
= “L”) with a microcontroller or other equipment. (refer to
1
0.2
S
Table 2 De-Emphasis Filter Settings (when in the parallel mode)
Shift (EMP) Pin
H
L
De-emphasis filter
ON
OFF
Figure 3 Digital Filter Frequency Characteristics
Frequency (kHz)
G
Frequency (kHz)
G
0
44.1
88.2
132.3
176.4
100.0
80.00
60.00
40.00
20.00
0.000
90.00
70.00
50.00
30.00
10.00
0
2.0
10.0
14.0
18.0
24.0
1.00
0.80
0.60
0.40
0.20
0.00
4.0 6.0 8.0
12.0
16.0
20.0 22.0
0.90
0.70
0.50
0.30
0.10
0.65dB
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