Datasheet

2007-05-29
6
BCR400W
RF transistor controlled by BCR400
EHA07217
V
S
+
3
4
BCR 400
12
RF-Transistor
ext.
R
Ι
contr.
C
Ι
drop
V
C
21
C
RF IN
RF OUT
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
RX/TX antenna switch, compatible to control logic
and working at wide battery voltage range
EHA07218
BCR 400
4
3
1
2
+
S
V
R
ext
4λ /
TX RX
TX
RX
> 2.7 V
= 100 - 220 ΩΩ
Antenna