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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(yè)數(shù)： | 4/20頁(yè) |
| 文件大?。?/td> | 264K |
| 代理商： | TC9470FN |
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TC9470FN
2002-02-27
4
Description of Block Operations
1. Crystal Oscillator Circuit and Timing Generator
The clock required for internal operations is generated by connecting a crystal and condensers as shown
in the diagram below.
The IC will also operate when a system clock is input from an external source through the XI pin (pin
1
5).
However, in this situation, due consideration must be given to the fact that waveform characteristics, such
as jitter and rising/falling characteristics of the system clock, significantly affect the DA converter’s noise
distortion and the S/N ratio.
The timing generator generates the clocks and process timing signals required for such functions as
digital filtering and de-emphasis filtering.
Figure 1 Crystal Oscillator Circuit Configuration (when in the 384 fs mode)
C
L
= 10 to 33 pF
To internal circuit
GNDX
16.9344 MHz
C
L
C
L
XI
XO
V
DX
X’tal
MCK
Use a crystal with a low CI value and favorable start-up characteristics.
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