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參數資料
| 型號： | U4050B-AFLG3 |
| 英文描述： | Speech Circuit with Line-Powered Loudspeaker Amplifier |
| 中文描述： | 語音電路線供電揚聲器放大器 |
| 文件頁數： | 1/18頁 |
| 文件大小： | 253K |
| 代理商： | U4050B-AFLG3 |
U4050B
Rev. A2, 05-Mar-98
1 (18)
Speech Circuit with Line-Powered Loudspeaker Amplifier
Description
The electronic speech circuit U4050B is a linear
integrated circuit for use in telephone sets. It replaces the
hybrid transformer, sidetone equivalent and ear
protection rectifiers.
The circuit is line powered and contains all components
necessary for amplification of signals and adaptation to
the line. An integrated loudspeaker amplifier allows
loudhearing operation.
Features
Integrated amplifier for loudhearing operation
Anticlipping for loudspeaker amplifier
Supply voltages for all functional blocks of a
subscriber set
Adjustable DC characteristics
Adjustable sending and receiving amplification
Automatic line loss compensation
Symmetrical output of earpiece amplifier
Built-in ear protection
Symmetrical input of microphone amplifier
Adjustable sidetone suppression independent
of sending and receiving amplification
DTMF and MUTE inputs
Anticlipping in transmit direction
Squelch
Integrated transistor for short circuiting the line
voltage
Power down
Operation possible at line currents above 10 mA
Benefits
Independent adjustment of transmit gain, receive gain
and sidetone suppression
Low number of external components
Block Diagram
Power supply
SA
SAI
TXA
RECO2
RECO1
5
16
15
14
13
12
11
8
7
6
3
GSA
SAO
CLISA
AGA
CK
VL
RDC
VC
VD
VM
SWAMP
IREF
GND
PD
MUTE
CLIM
–
+
+
–
LIMITER
GS
MICO
TIN
ST
GR
MIC1
MIC2
DTMF
LEVSQ
CSQ
2
9
10
4
1
17
18
19
20
21
22
23
24
25
26
27
28
MUTE
SQUELCH
AGA
NSA
LIMSA
+
–
REC. ATT.
U4050B
Figure 1. Block diagram
Ordering Information
Extended Type Number
U4050B-AFL
U4050B-AFLG3
Package
SO28
SO28
Remarks
Taped and reeled
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相關代理商/技術參數 |
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| U4055B | 制造商:TEMIC 制造商全稱:TEMIC Semiconductors 功能描述:Low-Voltage Electronic Speech Circuit with Dialer Interface |
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