RF FILTER AND DIGITAL BROADCAST RECEIVING TUNER AND RF SIGNAL PROCESSING DEVICE USING RF FILTER
First Claim
Patent Images
1. A radio frequency (RF) filter comprising:
- a band pass filter unit which filters on an input signal;
an amplifying unit which amplifies the input signal; and
a switching unit which activates the band pass filter unit if a frequency of the input signal is in a first band, and activates the amplifying unit if the frequency of the input signal is in a second band.
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Abstract
A radio frequency (RF) filter is provided which includes a band pass filter unit and an amplifying unit. If a signal having a frequency in a first band is input, the RF filter performs band pass filtering, and if a signal having a frequency in a second band is input, the RF filter performs an amplifying process. The RF filter can be used for various RF signal processing devices, such as digital broadcast receiving tuners.
13 Citations
16 Claims
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1. A radio frequency (RF) filter comprising:
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a band pass filter unit which filters on an input signal; an amplifying unit which amplifies the input signal; and a switching unit which activates the band pass filter unit if a frequency of the input signal is in a first band, and activates the amplifying unit if the frequency of the input signal is in a second band. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A digital broadcast receiving tuner comprising:
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a radio frequency (RF) filter which filters an input signal if a frequency of the input signal is in a first band, and amplifies the input signal if the frequency of the input signal is in a second band; and a harmonic rejection mixer which mixes an output signal of the RF filter with a local oscillator spectrum. - View Dependent Claims (8, 9, 10, 11, 12, 13, 14)
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15. A radio frequency (RF) signal processing device comprising:
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an RF filter which filters an input signal if a frequency of the input signal is in a first band, and amplifies the input signal if the frequency of the input signal is in a second band; and a harmonic rejection mixer which mixes an output signal of the RF filter with a local oscillator spectrum. - View Dependent Claims (16)
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Specification