Television tuner suitable for demodulation of both analog signals and digital signals
AssigneeAlps Electric Co., Ltd.
InventorMitsumasa Yoda
Life of this patent
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Abstract
There are provided a mixer for subjecting entered digital television signals or analog television signals to frequency conversion into an intermediate frequency band and an intermediate frequency tuning circuit so configured as to enable tuning frequency to be switched in the intermediate frequency band and provided at a stage immediately following the mixer, and the intermediate frequency tuning circuit is tuned to a first frequency substantially at a center of the intermediate frequency band when digital television signals are entered into. the mixer or to a second frequency, which is higher than the first frequency when analog television signals are entered.
Claims5
A television tuner provided with a mixer for subjecting entered digital television signals or analog television signals to frequency conversion into the intermediate frequency band and an intermediate frequency tuning circuit so configured as to enable a tuning frequency to be switched within the intermediate frequency band and arranged at a stage immediately following the mixer, wherein the intermediate frequency tuning circuit is tuned to a first frequency substantially at a center of the intermediate frequency band when the digital television signals are entered into the mixer or tuned to a second frequency higher than the first frequency when the analog television signals are entered into the mixer.
Dependencies are inferred from the claim text.