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To handle peak-to-average power ratio in 802.11a/g WLAN RX baseband, a 5th-order, 10.5 MHz cut-off frequency, instantaneously companding SC LPF is fabricated in a 0.13 ??m CMOS process. It occupies 2.2 mm2 active chip area and consumes 53 mW with a DR of 79 dB over an SNDR of 34 dB and EVMrms<3.8%, saving 3.3?? power and 1.5?? chip area as compared to the non-companding case.
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