Multi-channel switch device

A multi-channel switch device, comprising:

• a first-stage switch circuit, comprising:
• a first common-mode node;
• a first input/output terminal, configured to receive or output a high frequency signal;
• and
• at least one first-stage connection terminal;
• at least one second-stage switch circuit, each comprising:
• a second common-mode node;
• a second-stage transmission terminal, coupled to a corresponding one of the at least one first-stage connection terminal;
• and
• a plurality of second-stage connection terminals;
• a plurality of third-stage switch circuits, each comprising:
• a third common-mode node;
• a third-stage transmission terminal, coupled to a corresponding one of the second-stage connection terminals;
• a reference terminal, coupled to a reference voltage through a load;
• and
• a second input/output terminal, configured to output or receive the high frequency signal,
• wherein two of the first input/output terminal and the at least one first-stage connection terminal are connected through the first common-mode node,
• wherein two of the second-stage transmission terminal and the second-stage connection terminals are connected through the second common-mode node,
• wherein two of the third-stage transmission terminal, the reference terminal, and the second input/output terminal are connected through the third common-mode node, and
• wherein when a third-stage transmission terminal of a first switch circuit among the third-stage switch circuits is electrically connected to a second input/output terminal of the first switch circuit, second input/output terminals of the remaining third-stage switch circuits other than the first switch circuit are respectively electrically connected to reference terminals of the remaining third-stage switch circuits.