A 65 nm CMOS Multistandard, Multiband TV Tuner for Mobile and Multimedia Applications

摘要

This paper presents a direct conversion, multistandard TV tuner implemented on a 65 nm digital CMOS process occupying less than 7 ${hbox{mm}}{2}$. The tuner is compliant with several digital terrestrial, fixed and mobile TV standards, including DVB-T, DVB-H, T-DMB, and ISDB-T. It achieves a 3/3.2/3.5 dB noise figure at VHF, UHF, and L-band, respectively, while the measured sensitivity at UHF for the QPSK-½ DVB-T mode is $-{hbox{98~dBm}}$ at the PCB connector. The implemented RF front-ends support both single-ended and differential inputs. An integrated $Sigma$–$Delta $ fractional-N synthesizer operating from 1.2 to 1.8 GHz achieves less than 1$ {circ}$ integrated phase error, thus enabling a maximum SNR in excess of 37 dB for VHF and UHF. Multistandard capability is also enabled by programmable channel-select filters. Power consumption is less than 140 mW in DVB-T mode for all three bands.