A T-DMB mobile TV SoC tuner with compact size, low power and BoM in 65nm CMOS

摘要

This paper presents a direct conversion Korean standard T-DMB SoC tuner using a 65nm low power CMOS technology with the best feature of size, power and BoM ever reported. A digital F/E enhanced function is implemented to reduce analog signal processing empowered by oversampled A/D converter, digital channel selection filter and lots of digital calibration blocks. And the designed LNA excludes all required inductors. Thus high voltage gain and low current consumption are achieved due to their high Q factor. A single-to-differential signaling down-conversion mixer is also announced which has well balanced output characteristic. A DC/DC converter is adopted as well for the further low power consuming. The tunable clock frequency scheme of DC/DC buck converter can prevent a degradation of sensitivity performances which is planed value to escape the channel center frequency. This reported SoC tuner consumes only 28mA at maximum gain mode. And −103.5dBm of sensitivity and 48dBc of N ± 1 adjacent-channel selectivity are achieved also with only 5 external LC components. This SoC occupies 2.5×2.5mm2 die and WLCSP chip size.