Development of a New Frequency Synthesizer for Terrestrial Digital Television Broadcast Tuner by Fujitsu
In Japan the tuners that are incorporated into the TVs and mobile phones receive radio signals from broadcast towers, where the tuners will extract audio-visual data from those signals. The tuners employ frequency synthesizer capable of generating a clock signal that are equivalent to the frequency of the channel the viewer is selected to watch. The need of the frequency synthesizer within the tuners is due to thee fact that each channel which is transmitted by a broadcast tower occupies a different frequency. Terrestrial digital TV broadcast in Japan consists of 14 segments occupying 6 MHz of bandwidth. 12 of these segments are designated for TV, one for “1seg” broadcast for mobile phone, and the remaining one segment is left empty. Read more
