bc41b143a07 ETC-unknow, bc41b143a07 Datasheet - Page 49

• Manufacturer Part Number: bc41b143a07
• Description: Single Chip Bluetooth
• Manufacturer: ETC-unknow

9
9.1
The BlueCore4-ROM RF_IN terminal can be configured as either a single-ended or differential input. The operational
mode is determined by setting PSKEY_TXRX_PIO_CONTROL (0x20).
9.1.1
TX_A and TX_B form a complementary balanced pair. On transmit, their outputs are combined using a balun into the
single-ended output required for the antenna. Similarly, on receive, their input signals are combined internally. Both
terminals present similar complex impedances that require matching networks between them and the balun. Starting
from the substrate (chip) side, the outputs can each be modelled as an ideal current source in parallel with a lossy
resistance and a capacitor. The bond wire can be represented as series inductance.
CS-101564-DSP12
Device Terminal Descriptions
RF Ports
TX_A and TX_B
PA
PA
+
_
LNA
_
+
Figure 9.1: Circuit TX_A and TX_B
Production Information
© CSR plc 2003-2007
Switch
Switch
RF
RF
R2
10Ω
R3
10Ω
0.9pF
0.9pF
BlueCore
Device Terminal Descriptions
L2
1.5nH
L3
1.5nH
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