Filter circuit and radio apparatus

Details Filter circuit and radio apparatus Filter circuit and radio apparatus

2007-09-18

2007-09-18

Payne, David C. (Department: 2611)

Pulse or digital communications

Cable systems and components

C375S147000, C375S344000, C375S351000, C333S018000

Reexamination Certificate

active

10513792

ABSTRACT:
A distributor103distributes an input signal into two lines of distributed signals with equal amplitudes and equal phases. Buffers104, 105suppress interference between distributed signals distributed into the two lines. A filter106performs a frequency selection which allows only a distributed signal in a predetermined band to pass. A differential amplifier107outputs a difference in amplitude components between a distributed signal frequency-selected by the filter106and the distributed signal which is not frequency-selected. This allows an attenuation characteristic or passage characteristic in a high-frequency band to be maintained.

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English Language Abstract of JP 6-152318.
English Language Abstract of JP 2001-211098.
English Language Abstract of JP 61-230536.
English Language Abstract of JP 10-084250.
English Language Abstract of JP2001-045336.

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