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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(yīng)答機(jī) |
| 文件頁數(shù)： | 16/44頁 |
| 文件大?。?/td> | 752K |
| 代理商： | PSB4851 |
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PSB 4851
Data Sheet
16
09.99
3.
Speech
MIC1, PREFI1, MIC2, PREFI2, AHS and AXC are powered up. AHS is connected to
PREFI1 and AXC is connected to PREFI2. Therefore the signal fed into MIP2/MIN2 is
amplified by MIC2 and AXC and output at AXO. The signal fed into AXI is amplified by
MIC1 and AHS and output at HOP/HON. Figure 2-4 shows the signal routing and the
active elements.
Figure 2-4
Emergency Speech Mode
Note: An external circuitry should be provided to detect power failure and inform the
controller. The controller in turn should reduce the gain of the ALS amplifier if
necessary to avoid excessive power consumption.
Note: The serial control interface must remain operational even when some of the
connected devices are without power supply. Some devices have clamping diodes
at their inputs and might block the bus.
V
REF
AXI
MIP2
MIN2
HOP
HON
AXO
200
AHS
AXC
MIC1
MIC2
PREFI
1
PREFI
2
VREF
10k
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