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A low power Mobile TV tuner baseband for CMMB application

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5 Author(s)
Fang Yuan ; Suzhou-CAS Semicond. Integrated Technol. Res. Center, Suzhou, China ; Heping Ma ; Jim Yan ; Yin Shi
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A mobile TV tuner baseband for the newly established China Mobile Multimedia Broadcasting (CMMB) is presented. The baseband VGA achieves more than 40 dB gain tuning with temperature compensation. The baseband filter provides 0.5 dB passband ripple and 35 dB attenuation at 6 MHz with the cutoff frequency at 4 MHz. In addition, the calibration of filter is reported to achieve the bandwidth accuracy of 3%. A DC offset cancellation circuit is also introduced to remove the offset from layout and self-mixing, and the remaining offset voltage and current consumption are only 6 mV and 412 ¿A respectively. Implemented in a 0.35 ¿m SiGe technology with 1.1 mm2 die size, this tuner baseband achieves OIP3 of 25.5 dBm and consumes 16.4 mA under 2.8-V supply.

Published in:

Solid-State and Integrated-Circuit Technology, 2008. ICSICT 2008. 9th International Conference on

Date of Conference:

20-23 Oct. 2008