CYW4343X
6. WLAN Radio Subsystem
The CYW4343X includes an integrated WLAN RF transceiver that has been optimized for use in 2.4 GHz Wireless LAN systems. It
is designed to provide low power, low cost, and robust communications for applications operating in the globally available 2.4 GHz
unlicensed ISM band. The transmit and receive sections include all on-chip filtering, mixing, and gain control functions. Improve-
ments to the radio design include shared TX/RX baseband filters and high immunity to supply noise.
Figure 28 shows the radio functional block diagram.
Figure 28. Radio Functional Block Diagram
WL DAC
WL TXLPF
WL DAC
WL PA
WL PGA
WL TX G‐Mixer WL TXLPF
Voltage
Regulators
WLAN BB
WLRF_2G_RF
4 ~ 6 nH
Recommend
Q = 40
WL ADC
WL ADC
10 pF
WL RXLPF
WLRF_2G_eLG
SLNA
WL G‐LNA12
WL RXLPF
WL RX G‐Mixer
WL ATX
WL ARX
WL GTX
WL GRX
Gm
BT LNA GM
CLB
WL LOGEN
WL PLL
BT PLL
Shared XO
BT RX
BT TX
BT LOGEN
LPO/Ext LPO/RCAL
BT ADC
BT ADC
BT RXLPF
BT LNA Load
BT PA
BT RX Mixer
BT RXLPF
BT BB
BT FM
BT DAC
BT DAC
BT TX Mixer
BT TXLPF
6.1 Receive Path
The CYW4343X has a wide dynamic range, direct conversion receiver. It employs high-order on-chip channel filtering to ensure reli-
able operation in the noisy 2.4 GHz ISM band.
Document No. 002-14797 Rev. *H
Page 38 of 128
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