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參數(shù)資料
| 型號： | PSB4851 |
| 英文描述： | Analog Front End for Sophisticated Answering Machine |
| 中文描述： | 模擬前端的精密應答機 |
| 文件頁數(shù)： | 14/44頁 |
| 文件大?。?/td> | 752K |
| 代理商： | PSB4851 |
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PSB 4851
Data Sheet
14
09.99
A detailed functional diagram of the PSB 4851 is shown in figure 2-2.
Figure 2-2
Detailed Block Diagram of PSB 4851
Two differential inputs for microphones and one single ended input for the tip/ring
interface are fed to two analog input amplifiers (MIC2, MIC1). These amplifiers can be
programmed for a gain of up to 42 dB in steps of 6 dB.
For both the loudspeaker and the handset transducer differential amplifiers (ALS, AHS)
are provided. These amplifiers can be programmed within a range of 33 (24) dB in steps
of 3 dB or muted.
A third programmable amplifier (AXC) is provided for the tip/ring interface.
The high passes (HP) have a cut-off frequency of 150 Hz. These filters can be disabled
individually for the receive and transmit direction.
V
REF
AXI
MIP1
MIN1
MIP2
MIN2
HOP
HON
LSP
LSN
AXO
ALS
50
200
AHS
AXC
MIC1
MIC2
POFI
2
POFI
1
PREFI
1
PREFI
2
D/A
D/A
DECI
1
A/D
1
A/D
2
INT
2
DECI
2
INT
1
AFEDU
AFEDD
Inter-
face
VREF
10k
HP
HP
HP
HP
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