Abstract: A channel searching method may include setting a first channel in a broadcast signal, determining signal strength of the broadcast signal and generating an automatic gain control signal for the first channel, and when the signal strength satisfies a preset first requirement and the automatic gain control signal satisfies a preset second requirement, skipping demodulation of the first channel.

Abstract: A channel searching method may include setting a first channel in a broadcast signal, determining signal strength of the broadcast signal and generating an automatic gain control signal for the first channel, and when the signal strength satisfies a preset first requirement and the automatic gain control signal satisfies a preset second requirement, skipping demodulation of the first channel.

Abstract: An apparatus for searching broadcast channels may include a broadcast signal distributing unit distributing a broadcast signal, a first channel searching unit searching an analog broadcast channel in the distributed broadcast signal, a second channel searching unit searching a digital broadcast channel in the distributed broadcast signal, and a controlling unit receiving search results from the first channel searching unit and the second channel searching unit, generating effective channel information regarding the analog broadcast channel and the digital broadcast channel using the received search results, and controlling the second channel searching unit to skip a channel search in a frequency band in which the analog broadcast channel is present using the generated effective channel information regarding the analog broadcast channel when the search for the analog broadcast channel by the first channel searching unit is terminated first.

Abstract: Disclosed herein is an intermediate frequency filter having a variable pass band, which is capable of varying a pass band to minimize loss at a plurality of intermediate frequencies? The intermediate frequency (IF) includes a band pass filter unit arranged between a frequency conversion IC and a demodulation unit and configured to filter an IF signal output from the frequency conversion IC and output a resulting signal. A band varying unit is connected to the band pass filter unit and is configured to vary a pass band of the band pass filter unit. A switching unit connects or disconnects the band varying unit to or from the band pass filter unit. A control unit detects the IF signal and controls the switching unit in response to the IF signal so that the band varying unit is connected to or disconnected from the band pass filter unit.

Abstract: Disclosed herein is an intermediate frequency filter having a variable pass band, which is capable of varying a pass band to minimize loss at a plurality of intermediate frequencies. The intermediate frequency (IF) includes a band pass filter unit arranged between a frequency conversion IC and a demodulation unit and configured to filter an IF signal output from the frequency conversion IC and output a resulting signal. A band varying unit is connected to the band pass filter unit and is configured to vary a pass band of the band pass filter unit. A switching unit connects or disconnects the band varying unit to or from the band pass filter unit. A control unit detects the IF signal and controls the switching unit in response to the IF signal so that the band varying unit is connected to or disconnected from the band pass filter unit.

Abstract: There are provided a single package television tuning apparatus and a television receiver including the apparatus. The apparatus includes: a printed circuit board; a switching part installed on the printed circuit board and selecting one of a first radio frequency signal and a second radio frequency signal inputted; a tuner part installed on the printed circuit board and down-converting one of the first radio frequency signal and the second radio frequency signal, the one selected by the switching part; first and second input connectors receiving the first radio frequency signal and the second radio frequency signal; and a chassis supporting the first and second input connectors, covering the printed circuit board, the switching part, and the tuner part, and electrically connected to grounds of the switching part and the tuner part.

Abstract: There are provided a single package television tuning apparatus and a television receiver including the apparatus. The apparatus includes: a printed circuit board; a switching part installed on the printed circuit board and selecting one of a first radio frequency signal and a second radio frequency signal inputted; a tuner part installed on the printed circuit board and down-converting one of the first radio frequency signal and the second radio frequency signal, the one selected by the switching part; first and second input connectors receiving the first radio frequency signal and the second radio frequency signal; and a chassis supporting the first and second input connectors, covering the printed circuit board, the switching part, and the tuner part, and electrically connected to grounds of the switching part and the tuner part.