| 摘要 |
This invention relates to a device for correcting DC of a HDTV, which can correct DC(Direct Current) that is liable to cause in mixers, base band amplifiers and ADC(Analog/Digital Converter) for a HDTV receiver. The device includes a non-interference DC detector for detecting DC from digital signals of an I channel and a Q channel applied under non-interference conditions in which an IF signal input has been cut off. An interference DC detector for detecting DC from the digital signals of an I channel and a Q channel applied at every field according to data field synchronization signal applied from outside. A selection part for selecting either one of the DC values received from the non-interference DC detector and the interference DC dectector. And, a D/A conversion part for D/A conversion of the DC value received from the selection part. Whereby, the DC value varying with time can be corrected by using field synchronization data and without turning the switch of IF terminal off.
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