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A tunable high-Q RF filter suitable for wireless transmitters has been implemented in standard CMOS technology. Two stagger-tuned Q-enhanced resonators form a filter that can be tuned across frequency and bandwidth. A 5.145-GHz filter with 200-MHz bandwidth and 0.8-dB of ripple is demonstrated in an 802.11a sliding-IF transmitter. The transmitter provides spectral mask and EVM-compliant output power...
A single-chip IEEE 802.11g-compliant WLAN radio that implements all RF, analog, and digital PHY and MAC functions is implemented in a 0.18 /spl mu/m CMOS technology. The IC transmits 4 dBm EVM-compliant output power for a 64QAM OFDM signal. The overall receiver sensitivities are -95 dBm and -73 dBm for data rates 6 Mbit/s and 54 Mbit/s, respectively.
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