A Multi-Standard Analog and Digital TV Tuner for Cable and Terrestrial Applications

A TV tuner fully compliant with ATSC, NTSC, PAL, SECAM, OVB-T, ISDB-T and DMB-T/H standards is described. An array of power detectors and fine-step-size digital gain controls are used to achieve an optimum signal-path gain. The tuner achieves an input sensitivity of better than -84dBm for ATSC digital off-air signals. Implemented in a 0.35mum SiGe BiCMOS process, it occupies 7.3mm
²
and consumes 1.5W from a split 5V/3.3V supply