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This paper presents a 6th-order active-RC low-pass filter with 240 MHz to 500 MHz tunable bandwidth, which is suitable for the ultra-wideband transceivers. The filter consumes only 2.3 mA from 1.8 V supply voltage, which is mainly attributed to the proposed highly power-efficient operational amplifier (Opamp) with an adaptive-biased pole-cancellation push-pull source follower as the buffer stage to...
This paper presents an RF MEMS switched-capacitor suitable for VHF and UHF tunable filters and reconfigurable matching networks. The device is based on a symmetric circular beam geometry that results in low-series-inductance compact device arrays for high-value capacitances. Device arrays are shown with down-state capacitances ranging from 11.22 to 17.49 pF, with associated impedances of 144-7 Omega...
This paper presents a low-power flexible receiver chain in digital 90 nm CMOS for multimode mobile communication. The receiver is based on a wideband front-end for a frequency range from 200 MHz to 5.5 GHz. A low-pass sampler with strong second order anti-alias protection based on triangular-wave integration sampling is employed in the baseband to provide a clock tunable flexible baseband bandwidth...
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