Input signal processing device, high-frequency component aqcuisition method, and low-frequency component acquisition method

摘要

It is possible to smoothly separate a signal according to the frequency band. An input signal processing device includes: an input signal terminal for receiving an input signal; a grounding capacitance element which is grounded; a grounding inductance element which is grounded; a connection inductance element for connecting the grounding capacitance element to the input signal terminal; a connection capacitance element for connecting the grounding inductance element to the input signal terminal; a first switch for selectively grounding a first intermediate portion between the connection inductance element and the grounding capacitance element; and a second switch for selectively grounding a second intermediate portion between the connection capacitance element and the grounding inductance element. When the first switch is turned ON, it is possible to acquire a high-frequency component from a high-frequency component output terminal. When the second switch is turned ON, it is possible to acquire a low-frequency component from a low-frequency component output terminal.