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