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Low-power baseband filter for zero-intermediate frequency digital video broadcasting terrestrial/handheld receivers

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6 Author(s)
C. i. Lujan-Martinez ; Departmento de Ingenier¿a Electro¿nica, Escuela Superior de Ingenieros, Universidad de Sevilla ; R. G. Carvajal ; A. Torralba ; A. j. Lopez-Martin
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Digital video broadcasting terrestrial (DVB-T) is being adopted by many countries all over the world. Recently, DVB-H, a new standard compatible with DVB-T, has been proposed for handheld terminals, which demands low power consumption. In this study, a continuous-time filter for DVB-T/H receivers is presented. High linearity and low noise are achieved by selecting a Gm-C filter topology implemented with a novel programmable transconductor based on MOS transistors in the triode region. The filter is tunable in a wide range, which makes it suitable for VLSI integration. The filter has been designed in a standard 0.5 m CMOS technology with a single 3.3 V supply voltage. Experimental results show an IM3 of 58 dB for a two tone experiment with 2 Vpp output signal centred at 2 MHz.

Published in:

IET Circuits, Devices & Systems  (Volume:3 ,  Issue: 5 )