RF filter and digital broadcast receiving tuner and RF...

Telecommunications – Receiver or analog modulated signal frequency converter – Frequency or phase modulation

Reexamination Certificate

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Details

C455S339000, C455S003010

Reexamination Certificate

active

07983639

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.

REFERENCES:
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patent: 5530923 (1996-06-01), Heinonen et al.
patent: 5909643 (1999-06-01), Aihara
patent: 6070063 (2000-05-01), Yoshizawa et al.
patent: 6313698 (2001-11-01), Zhang et al.
patent: 6927646 (2005-08-01), Niemi
patent: 7167688 (2007-01-01), Li et al.
patent: 7171235 (2007-01-01), Haapoja
patent: 7212796 (2007-05-01), Okanobu

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