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Abstract

An N-path filter includes N-number signal paths connected in parallel to each other between first and second input-output terminals. Each N-number signal path includes a first switch connected to the first input-output terminal to modulate an input signal, a second switch connected to the second input-output terminal to modulate the input signal in a same phase as that of the switch, and a base filter connected between the first and second switches. The first and second switches are operable to modulate the input signal in a phase of one period including different phases of the different signal paths. The base filter is a band pass filter including only passive elements.

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