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1.33 mW, 2 V CMOS continuous-time bandpass filter with two decades of centre frequency tuning range and high Q

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5 Author(s)
R. G. Carvajal ; Dept. de Ingenieria Electron., Univ. de Sevilla, Spain ; J. Galan ; A. Torralba ; F. Munoz
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A gm-C bandpass biquad filter featuring two decades of centre frequency tuning capability and a wide range of quality factor tunability is presented. It uses a new linear operational transconductance amplifier (OTA) based on two crosscoupled class-AB pseudo-differential pairs, which exhibits a wide transconductance adjustability range with low power consumption. The filter has been fabricated in a standard 0.8 μm CMOS process. Experimental results show a frequency tuning range from 300 kHz to 32 MHz and a maximum quality factor of 501. The filter is operated at 2 V supply voltage with a power consumption ranging from 1.18 to 1.8 mW.

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IEE Proceedings - Circuits, Devices and Systems  (Volume:152 ,  Issue: 5 )