WS1105 查看數據表（PDF） - Avago Technologies
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WS1105 Datasheet PDF : 15 Pages
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Peripheral Circuit in Handset
VBATT
C5
RF In
MSMPA_R0
C3
C2
C1
+2.85V
Vcc1 Vcc2
WS1105
Vcont
C4
C6
C7
L1
Output Matching Circuit
GND
C8
Figure 10. Peripheral circuit
Notes :
– Recommended voltage for Vref is 2.85V
– Place C1 near to Vref pin
– Place C3 and C4 close to pin 1 (Vcc1) and pin 8 (Vcc2). These capacitors can affect the RF performance
– Use 50: transmission line between PAM and Duplexer and make it as short as possible to reduce conduction loss
– S-type circuit topology is good to use for matching circuit between PA and Duplexer
RF Out
7
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