J. Ryckaert, J. Borremans, B. Verbruggen, J. Van Driessche, L. Van der Perre, J. Craninckx, G. van der Plas
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A 2.4GHz 40mW 40dB SNDR/62dB SFDR 60MHz bandwidth mirrored-image RF bandpass ΣΔ ADC in 90nm CMOS
A 6th order RF bandpass SigmaDelta ADC operating on the 2.4 GHz ISM band is presented. The bandpass loop filter is based on digitally programmable Gm-LC resonators. By using a mirrored-image sampling technique, the clock frequency is reduced to 3 GS/s, thereby reducing the power consumption. Implemented in a standard 90 nm CMOS process, the IC achieves 40 dB and 62 dB of SNDR and SFDR respectively on a 60 MHz bandwidth with 40 mW of power consumption.
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