BCR400W_07 Datasheet, PDF (6/9 Pages) Infineon Technologies AG – Active Bias Controller

BCR400W
RF transistor controlled by BCR400
BCR 400
+V _S
3
R _ext. V_drop
4
1
RF IN
Ι_C
2
C₁
C₂
Be aware that BCR400 stabilized
bias current of transistors in an active
control loop
In order to avoid loop ascillation
(hunting),
time constants must be chosen
adequately, i.e. C1 >= 10 x C2
Ι _contr.
RF OUT
RF-Transistor
EHA07217
RX/TX antenna switch, compatible to control logic
and working at wide battery voltage range
Antenna
λ/ 4
TX
RX
BCR 400
RX
TX
R _ext = 100 Ω - 220 Ω
1
4
2
3
+V_S > 2.7 V
EHA07218
6
2007-05-29