欧美成人免费电影,国产欧美一区二区三区精品酒店,精品国产a毛片,色网在线免费观看

參數(shù)資料
型號: HC5526
廠商: Intersil Corporation
英文描述: ITU CO/PABX SLIC with Low Power Standby(用戶線接口電路(SLIC))
中文描述: 國際電聯(lián)合作/交換機用戶接口的低功耗待機(用戶線接口電路電路(SLIC))
文件頁數(shù): 10/19頁
文件大小: 234K
代理商: HC5526
10
Therefore:
Equation 16 can now be used to match the SLIC’s
impedance to any known line impedance (Z
TR
).
Example:
Calculate Z
T
to make Z
TR
= 600
in series with 2.16
μ
F.
R
F
= 20
.
-----------------------------------------
+
Z
T
= 560k
in series with 2.16nF.
(AC) 2-Wire to 4-Wire Gain
The 2-wire to 4-wire gain is equal to V
TX
/ V
TR
.
From Equations 9 and 10 with V
RX
= 0:
V
TR
(AC) 4-Wire to 2-Wire Gain
The 4-wire to 2-wire gain is equal to V
TR
/V
RX
.
From Equations 9, 10 and 11 with E
G
= 0:
For applications where the 2-wire impedance (Z
TR
,
V
RX
Equation 15) is chosen to equal the line impedance (Z
L
), the
expression for A
4-2
simplifies to:
(AC) 4-Wire to 4-Wire Gain
The 4-wire to 4-wire gain is equal to V
TX
/V
RX
.
From Equations 9, 10 and 11 with E
G
= 0:
Transhybrid Circuit
The purpose of the transhybrid circuit is to remove the receive
signal (V
RX
) from the transmit signal (V
TX
), thereby preventing
an echo on the transmit side. This is accomplished by using an
external op amp (usually part of the CODEC) and by the
inversion of the signal from the 4-wire receive port (RSN) to the
4-wire transmit port (V
TX
). Figure 17 shows the transhybrid
circuit. The input signal will be subtracted from the output signal
if I
1
equals I
2
. Node analysis yields the following equation:
The value of Z
B
is then:
Where V
RX
/V
TX
equals 1/ A
4-4
.
Therefore:
Example:
Given: R
TX
= 20k
, Z
RX
= 280k
, Z
T
= 562k
(standard
value), R
F
= 20
and Z
L
= 600
.
The value of Z
B
= 18.7k
.
V
TX
RSN
TIP
RING
I
M
1000
Z
TR
V
TR
E
G
-
V
TX
I
M
V
TX
Z
RX
1
HC5526
R
F
R
F
A = 4
+
-
+
-
+
+
-
Z
T
+
-
V
RX
+
-
A = 250
A = 250
I
M
Z
L
FIGURE 16. SIMPLIFIED AC TRANSMISSION CIRCUIT
Z
T
1000
Z
TR
2R
F
(
)
=
(EQ. 16)
Z
T
1000
600
j
ω
2.16
10
6
2
20
=
A
2
4
-----------
Z
1000
T
F
--------------------------+
=
=
(EQ. 17)
A
4
2
-----------
Z
RX
-----------
Z
------------
2R
F
Z
L
+
+
--------------------------------------------
=
=
(EQ. 18)
A
4
2
Z
RX
-----------
1
2
--
=
(EQ. 19)
A
4
4
V
RX
-----------
Z
RX
-----------
Z
2R
+
------------
2R
F
Z
L
+
+
--------------------------------------------
=
=
(EQ. 20)
V
TX
-----------
V
B
-----------
+
0
=
(EQ. 21)
Z
B
R
TX
V
TX
-----------
=
(EQ. 22)
Z
B
R
TX
Z
T
-----------
Z
------------------+
------------
2R
F
F
Z
L
+
+
L
=
(EQ. 23)
HC5526
相關(guān)PDF資料
PDF描述
HC5549CM Low Power SLIC with Battery Switch
HC5549IM THERMISTOR PTC1KOHM 70 DEG 0805
HC5549 Low Power SLIC with Battery Switch(用戶線接口電路)
HC573 Octal 3-State Noninverting Transparent Latch(High-Performance Silicon-Gate CMOS)
HC595 8-Bit Serial-Input/Serial or Parallel-Output Shift Register with Latched 3-State Outputs
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
HC5526_03 制造商:INTERSIL 制造商全稱:Intersil Corporation 功能描述:ITU CO/PABX SLIC with Low Power Standby
HC55261P 制造商:Rochester Electronics LLC 功能描述:- Bulk
HC5526CM 制造商:Rochester Electronics LLC 功能描述:COST CO/PBX SLIC,54DB LONG BAL,28PLC - Bulk
HC5526CM96 制造商:Rochester Electronics LLC 功能描述:- Bulk
HC5526CP 制造商:Rochester Electronics LLC 功能描述:DIGITAL LOOP CARRIER SLIC - Bulk
主站蜘蛛池模板: 新乡县| 五华县| 依安县| 寻甸| 蓝山县| 靖西县| 海阳市| 界首市| 基隆市| 凤庆县| 松滋市| 大安市| 甘德县| 拉萨市| 济南市| 凌海市| 陕西省| 柘荣县| 清苑县| 宾川县| 右玉县| 上饶县| 乌恰县| 鄂托克旗| 来凤县| 香格里拉县| 蒲城县| 台东市| 永年县| 平乡县| 新竹市| 南木林县| 云梦县| 建瓯市| 利津县| 武安市| 临夏县| 黔江区| 鄱阳县| 宁河县| 元谋县|