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參數(shù)資料
| 型號(hào)： | AS3802 |
| 廠商： | AUSTRIAMICROSYSTEMS AG |
| 元件分類： | 衰減器 |
| 英文描述： | CDMA/FM RECEIVE AGC AMPLIFIER AS3802 |
| 中文描述： | RF/MICROWAVE WIDE BAND LOW POWER AMPLIFIER |
| 文件頁(yè)數(shù)： | 5/9頁(yè) |
| 文件大?。?/td> | 91K |
| 代理商： | AS3802 |
Preliminary Data Sheet
AS3802
Rev. A
5/9
Jul 98
Definition of CDMA Source Impedance,
Z
S
, and AS3802 Input Impedance Z
IN
IF Signal
Source
CDMA+
Zs=500
Zin=1k
(typ)
Vp
Vn
CDMA-
R=1k
The value of the 1k
resistor is calculated in the
matching network between the filter and the input of the
RX-APM.
Definition of FM Source Impedance, Z
S
,
and AS3802 Input Impedance Z
IN
IF Signal
Source
FM+
Zs=850
Zin=850
(typ)
Vp
Vn
FM-
(AC GND)
AC GND is defined as FM- in the package pin definition.
Definition of Load Impedance, Z
L
, and
AS3802 Output Impedance Z
O
RX-CDMA
Z
L
Measurement
Reference Plane
OUT+
Output
Port
OUT-
VCC
Z1
R
B
Z1
Z
0
ZL
eff
RX-CDMA Output Port Impedance
Load Impedance
Bias Resistor
Bias Inductors
Z
O
>5k
Z
L
=500
R
B
=500
*
L=Choke,
ω
.L>>R
B
*
Z
Leff
=250
Effective Load
*Note:
Z
1
can be a resistor or a choke.
If it is a resistor Z
1
=R
1
=250
then R
B
is not
used.
If it is a choke,
ω
.L>>R
B
and R
B
=500
.
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