A CMOS gm-C polyphase filter with high image band rejection
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This paper presents a 7th order polyphase (14th order bandpass) gm-C IF filter implemented in a 0.35 µm CMOS process. The filter bandwidth is 1 MHz, the center frequency is 3 MHz, the image band rejection is higher than 53 dB, the stop band attenuation is at least 40 dB, and the in-band group delay variation is 0.5 µs. The noise floor is 170 µVrmsand the spurious free dynamic range is at least 59 dB for out-of-band signals. Current consumption is 3.2 mA from a 2.3 V power supply. The filter is well suited for employment in the Bluetooth short-range radio.
[1] Pietro Andreani,et al. A CMOS g/sub m/-C IF filter for Bluetooth , 2000, Proceedings of the IEEE 2000 Custom Integrated Circuits Conference (Cat. No.00CH37044).
[2] Bram Nauta,et al. A CMOS transconductance-C filter technique for very high frequencies , 1992 .
[3] Michiel Steyaert,et al. Low-IF topologies for high-performance analog front ends of fully integrated receivers , 1998 .