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A single-in-differential-out variable gain wideband LNA without on-chip inductor for CMMB TV tuner is implemented in 0.18 ??m CMOS. The LNA provide gain modes ranging from 18 dB to -12 dB with a 6 dB step. The LNA exhibits an IIP3 of 7.76 dBm and an NF of less than 2.4 dB at 18 dB gain mode. The output imbalance is only 0.01 dB in amplitude and 0.2 degree in phase at 18 dB gain mode. The IIP3 at -12...
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