RF2153
Application Schematic
Korea - CDMA
VC
2nd Interstage tuning for
C
centering frequency response
Bypassing for VCC
2
10 nF
10 nF
10 nF
1st Interstage tuning to
m atch input return loss
To m atch input return loss
and vary gain
RF IN
9 pF
1.8 nH
180 Ω
15 pF
10 pF
15 pF
TL3
1 16 15 14 13
2
12
3
11
4
10
5
6
7
8
9
47 Ω
27 Ω
TL1
15 nH
15 pF
15 pF
15 pF
Ground for 2nd
Harm onic Trap
12 nH* 1.0 pF + .25 pF
TL2
5.6 pF**
15 pF
RF OUT
2.2 pF**
M atching Network for
optim um load im pedance
Bias return
Bypassing for
VREG1 and VREG2
VREG
VMODE
Tied together for optim um linearity
1 kΩ
Transm ission
Line Length
CDMA (Korea)
TL1
30 m ils
* High Q inductor (i.e., Coilcraft 0805HQ -series).
**High Q capacitors (i.e., Johanson C-series).
TL2
100 m ils
TL3
30 m ils
2-172
Rev A18 001114