N-path filter
AssigneeMurata Manufacturing Co., Ltd.
InventorHajime KANDO
Life of this patent
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Abstract
An N-path filter includes an N number of signal paths, where N is an integer of three or more, connected in parallel with one another between an input-output terminal and an input-output terminal. A signal path includes a switch that is connected to the input-output terminal and that modulates an input signal, a switch that is connected to the input-output terminal and that modulates the input signal with the same phase as the switch, and a base filter that is connected between the switch and the switch. The switches modulate the input signal with a phase that is one of phases of the signal paths defining one period and is different for each of the signal paths. Base filters are each a low pass filter including inductors.
Claims9
An N-path filter comprising:
- a first input-output terminal and a second input-output terminal;
- and
- an N number of signal paths, where N is an integer of three or more, connected in parallel with one another between the first input-output terminal and the second input-output terminal;
- wherein
- each of the N number of signal paths includes:
- a first modulator connected to the first input-output terminal and configured to modulate an input signal input from the first input-output terminal or the second input-output terminal;
- a second modulator connected to the second input-output terminal and configured to modulate the input signal with a same phase as the first modulator;
- and
- a base filter connected between the first modulator and the second modulator;
- the first modulator and the second modulator are configured to modulate the input signal with a phase that is one of phases of the N number of signal paths defining one period and is different for each of the signal paths;
- and
- the base filter is a low pass filter including an inductor.
Dependencies are inferred from the claim text.