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參數(shù)資料
| 型號(hào)： | U3500BM-BFLG3 |
| 英文描述： | Cordless Telephone Signal Processor |
| 中文描述： | 無(wú)繩電話信號(hào)處理器 |
| 文件頁(yè)數(shù)： | 1/17頁(yè) |
| 文件大?。?/td> | 230K |
| 代理商： | U3500BM-BFLG3 |
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U3500BM
Preliminary Information
Rev. A3, 20-May-98
1 (17)
Cordless Telephone Signal Processor
Description
The programmable cordless phone signal processor
includes all necessary low frequency parts such as
microphone- and earphone amplifier, compander, pre-
emphasis, deemphasis, scrambler, data management,
power-supply management, as well as RF receiving parts
such as IF converter, FM demodulator. RSSI and low
noise amplifier.
Several gains and mutes in transmit and receive direction
are controlled by serial bus while compander, pre- and
deemphasis and scrambler can be bypassed.
Features
RF Receiver Part
Low-noise amplifier
IF converter
FM demodulator
RSSI
Low Frequency Part
Symmetrical input of microphone amplifier
Symmetrical output of earpiece amplifier
Compander
Pre- and deemphasis
Scrambler
Data management
Power-supply management
Serial bus
Application:
CT0
Block Diagram
LOG
MIXO
IFIN2
IFIN1
DACO
Scrambler
frequency
Expander
REC
Oscillator
11.15 MHz
LNA
MIXIN
MIXGND
LOIN
LNAIN
RGND
LNAO
VBATT
D/A
Battery low
detector
LPF
C
D
Serial
Bus
LPF
TGAIN
ADJ.2
Limiter
Preem
TGAIN
ADJ.1
Compressor
IFAMP
Demodulator
RGAIN
ADJ
LPF
LPF
Deem
MIC
Scrambler
frequency
RXO
ETC
EXIN
RECO2
RECO1
RXDAT
TXDAT
MIC1
MIC2
MICO
COIN
VCC
TXO
GND
CTC
14678
LPF
Divider
Figure 1. Block diagram
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