Tien-Yu Lo, Chuan-Cheng Hsiao, K. Hsueh, Hung-Sung Li
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A 1-V 60MHz bandpass filter with quality-factor calibration in 65nm CMOS
A 5-th order bandpass filter is implemented in this paper. The filter can perform SAW filter function required in the tuner. In this design, leap-frog synthesis is used and the Active-RC topology is implemented. To save power consumption, the amplifier with a smaller unity gain-bandwidth is designed, and a new quality-factor calibration strategy is presented to compensate the non-ideal effect of the filter. In addition, the accurate center frequency is obtained by adopting a modified frequency tuning scheme. The filter was fabricated in 65nm CMOS process, and consumes 23.5mW under 1-V supply.
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