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參數(shù)資料
| 型號： | X9470V24I |
| 英文描述： | RF Power Amplifier (PA) Bias Controller |
| 中文描述： | 射頻功率放大器（PA）的偏置控制器 |
| 文件頁數(shù)： | 18/25頁 |
| 文件大小： | 542K |
| 代理商： | X9470V24I |
PeimnayInomaion
18 of 25
REV 11.16 3/20/03
www.xicor.com
Preliminary Information
X9470
Figure 6. Dynamic Biasing Technique: Automatic DC Bias Operating Point Adjustment
State 0
Monitor
Mode
State 1
Calibration
(no RF present)
State 2
RF present
State 3
Recalibrate bias
point for drift
and temperature
State 4
shut
down
Set Operating Range Scale for Bias Adjustment
RF signal
V
REF
CS
SCL
INC/DEC
SHDN
V
BIAS
1
2
3
4
5
6
R
default is
zero point of R
total
Latch R
DC point
in calibration vs V
REF
RF present
Turn off
Bias
Adjustment
R
bias
increase/decrease
after RF present due to
temperature increase &
V
GS
-threshold drift
IDQ vs. gate
voltage bias
optimized
Shut
down
BiasLock
Saves wiper position to
volatile memory
Bias Adjustment ON
Bias Adjustment OFF
Bias Adjustment ON
Automatic Bias Adjustment
BiasLock
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| X9470 | RF Power Amplifier (PA) Bias Controller |
| X9470V24I | RF Power Amplifier (PA) Bias Controller |
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