- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄382716 > UBA2050 (NXP Semiconductors N.V.) One-chip telephone ICs with speech, dialler and ringer functions(帶語音，撥號及振鈴功能的單片電話芯片) PDF資料下載
參數(shù)資料
| 型號： | UBA2050 |
| 廠商： | NXP Semiconductors N.V. |
| 英文描述： | One-chip telephone ICs with speech, dialler and ringer functions(帶語音，撥號及振鈴功能的單片電話芯片) |
| 中文描述： | 一個有語言，撥號及鈴聲功能（帶語音，撥號及振鈴功能的單片電話芯片集成電路芯片的電話） |
| 文件頁數(shù)： | 16/52頁 |
| 文件大小： | 278K |
| 代理商： | UBA2050 |
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頁當前第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
2000 May 19
16
Philips Semiconductors
Product specification
One-chip telephone ICs with speech,
dialler and ringer functions
UBA2050(A); UBA2051(A;C)
S
IDETONE
S
UPPRESSION
The anti-sidetone network for the UBA205xx, comprising
R
CC
in parallel with Z
line
, R
ast1
, R
ast2
, R
ast3
, R
SLPE
and Z
bal
(see Fig.16), suppresses the transmitted signal in the
earpiece. Maximum compensation is obtained when the
following conditions are fulfilled:
R
SLPE
×
R
ast1
= R
CC
×
(R
ast2
+ R
ast3
)
(
×
ast1
R
SLPE
×
Z
bal
= k
×
Z
line
The scale factor k is chosen to meet the compatibility with
a standard capacitor from the E6 or E12 range for Z
bal
.
In practice, Z
line
varies considerably with the line type and
the line length. Therefore, the value of Z
bal
should be
chosen for an average line length, which gives satisfactory
sidetone suppression with short and long lines.
The suppression also depends on the accuracy of the
match between Z
bal
and the impedance of the average
line.
The anti-sidetone network for the UBA205xx attenuates
the received signal from the line by 32 dB before it enters
the receive stage. The attenuation is almost constant over
the whole audio frequency range.
A Wheatstone bridge configuration (see Fig.17) may also
be used.
More information on the balancing of an anti-sidetone
bridge can be obtained in our publication “Application
Handbook for Wired Telecom Systems, IC03b”
k
R
------------R
R
ast3
R
SLPE
+
)
=
handbook, full pagewidth
MGT046
Im
Zir
IR
Rast1
Rast3
Rast2
SLPE
RSLPE
GND
Zline
RCC
LN
Zbal
Fig.16 Equivalent circuit of UBA205xx anti-sidetone bridge.
相關PDF資料 |
PDF描述 |
|---|---|
| UBA2050A | One-chip telephone ICs with speech, dialler and ringer functions(帶語音，撥號及振鈴功能的單片電話芯片) |
| UBA2051 | One-chip telephone ICs with speech, dialler and ringer functions |
| UBA2051A | One-chip telephone ICs with speech, dialler and ringer functions |
| UBA2051AT | One-chip telephone ICs with speech, dialler and ringer functions |
| UBA2051C | One-chip telephone ICs with speech, dialler and ringer functions |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| UBA2050A | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:One-chip telephone ICs with speech, dialler and ringer functions |
| UBA2050AT | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:One-chip telephone ICs with speech, dialler and ringer functions |
| UBA2050T | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:One-chip telephone ICs with speech, dialler and ringer functions |
| UBA2051 | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:One-chip telephone ICs with speech, dialler and ringer functions |
| UBA2051A | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:One-chip telephone ICs with speech, dialler and ringer functions |
發(fā)布緊急采購，3分鐘左右您將得到回復。