參數(shù)資料
型號: STLC7545
廠商: 意法半導(dǎo)體
英文描述: Enhanced V.34 BIS Analog Front-End(單片模擬前端)
中文描述: 國際清算銀行增強.34模擬前端(單片模擬前端)
文件頁數(shù): 47/53頁
文件大小: 378K
代理商: STLC7545
X - TYPICAL APPLICATIONS
X.1 - MULTI-STANDARD MODEM WITHECHO CANCELLING
Serial
Interfaces
Rx
Tx
STLC7545
AFE
System
Bus
MCU
TxA
Analog
Signals
RxA
Modem Clocks
Modem Data
To Terminal
DSP
V
7
Figure 15 :
MultistandardModem with Echo CancellingCapability
100pF
100pF
680pF
C
2R
22k
13.2k
13.2k
22k
22k
22k
TxA1
TxA2
C
2R
Z0/2
Z0/2
Phone
LIne
R
R
1.2k
1.2k
C’
2.2nF
RxA1
RxA2
V
CM
V
CM
C : Improve the low frequency response.
Its value depends on the transformer inductance.
C’: Reduces the DC offset gain.
Z0 : Nominalline impedance.
R’
r
R’
2.2nF
7
Figure 16 :
DifferentialDuplexer
X.2 - LINE INTERFACE
STLC7545
47/53
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