- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄373630 > TEA7092TQT (意法半導體) TELEPHONE ANALOG FRONT END PDF資料下載
參數(shù)資料
| 型號： | TEA7092TQT |
| 廠商： | 意法半導體 |
| 英文描述： | TELEPHONE ANALOG FRONT END |
| 中文描述： | 電話模擬前端 |
| 文件頁數(shù)： | 27/57頁 |
| 文件大小： | 574K |
| 代理商： | TEA7092TQT |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁當前第27頁第28頁第29頁第30頁第31頁第32頁第33頁第34頁第35頁第36頁第37頁第38頁第39頁第40頁第41頁第42頁第43頁第44頁第45頁第46頁第47頁第48頁第49頁第50頁第51頁第52頁第53頁第54頁第55頁第56頁第57頁
II - SPEECHFEATURES
(continued)
II.5 - Receive Channel
(continued)
The gain between Pin RECIN (Pin 19) and the
earphone outputs,
Pin EAR+ (Pin 35) and
Pin EAR-(Pin 36) is :
- With tracking sidetoneandA.G.C.features,ear-
phoneconnected in symmetric mode :
On long line,I
L
= I
LL
, maximumgain
Grl
(
dB
) =
20
logVear
V
L
=
20
log
(
Gsid
(
l
))
+
21dB
+
20
log
2
R17
R14
On short line, I
L
= I
SL
, minimum gain
Grs
(
dB
) =
20
logVear
V
L
=
20
log
(
Gsid
(
s
)) +
15dB
+
20
log
2
R17
R14
- With One sidetone network and A.G.C. features,
earphoneconnectedin symmetric mode :
On long line,I
L
= I
LL
, maximumgain
Grl1
(
dB
) =
20
logVear
V
L
=
20
log
(
Gsid
) +
21dB
+
20
log
On short line, I
L
= I
SL
, minimum gain
Grsl
(
dB
) =
Grl1
6dB
It is possible to use only one output, asymmetric
mode, in this case all the receivegain are reduced
by 6dB.
Figure42
2
R17
R14
Figure42 showsthe asymmetric connection.
Note :
Due to the concept used to power supply
the earphone through the impedance network
(R10) and with the V
CC
supply, it is preferable to
connect the earphone in asymmetric mode if the
earphone impedance is less than 300
, and in
symmetric mode if the earphone impedance is
more than 300
. More details are given in the
following paragraph.
II.5.2 - Maximum Output Level
The maximum output level depends on several
parameters:
- The DC level on Pin V
L
(Pin 3).
- The impedance network value connected be-
tween PinRECIN (Pin 19)and Pin V
CC
(Pin 26).
- The earphoneimpedancevalue.
Figure 43 shows the earphone amplifier supply
principle.
WithoutACsignalthevoltageatPin V
CC
(Pin26) is :
V
CC
= V
L
+ R11a/b x I
L
- (R10 + R11a/b) x I
P
The value at Pin V
L
(Pin 3) depends on R12
(see SectionII.1.1).
When an ac signal is amplified, the current driving
the earphone,Iear, flowsthrough R10 and the DC
voltageat Pin V
CC
(Pin26) is reduced.
20
GREC
V
REF
A2
35
EAR+
A3
-1
26
36
EAR-
+
C8
V
CC
37
REOUT
From
Sidetone
Mixer
R17
R14
+
C24
TEA7092
RECEIVE AMPLIFIER
Earphone
A
TEA7092 - TELEPHONE SET INTEGRATEDCIRCUIT
27/57
相關PDF資料 |
PDF描述 |
|---|---|
| TEA7530DP | MONITOR AMPLIFIER |
| TEA7530FP | MONITOR AMPLIFIER |
| TEA7530 | Monitor Amplifier(監(jiān)聽放大器) |
| TEA7532DP | MONITOR AMPLIFIER |
| TEA7532FP | MONITOR AMPLIFIER |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| TEA7530 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:MONITOR AMPLIFIER |
| TEA7530DP | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:MONITOR AMPLIFIER |
| TEA7530FP | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:MONITOR AMPLIFIER |
| TEA7531 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:MONITOR AMPLIFIER |
| TEA7532 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:MONITOR AMPLIFIER |
發(fā)布緊急采購，3分鐘左右您將得到回復。