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

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

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Published

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 µm 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.

Inspec keywords: digital video broadcasting; continuous time filters; CMOS integrated circuits; VLSI; television receivers; low-power electronics

Other keywords: triode region; Gm-C filter topology; digital video broadcasting terrestrial-handheld receivers; low-power baseband filter; CMOS technology; zero-intermediate frequency DVB-T receiver; VLSI integration; size 0.5 m; MOS transistors; programmable transconductor; handheld terminals; continuous-time filter; voltage 3.3 V

Subjects: Active filters and other active networks; CMOS integrated circuits; Radio and television receivers

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