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A RF tunable active bandpass filter with active inductor using Q-enhancement circuit is presented. The RF active filter was implemented by the TSMC 0.35 ??m 3P3M BiCMOS process. In order to improve the quality factor of the active inductor, the Q-enhancement circuit was used to compensate the loss of the active inductor. The insertion loss of the RF tunable active filter is about 0.5 dB, and the tuning...
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