Switch circuit

A switch circuit to be mounted in a device having a common terminal which allows insertion of a terminal of a cable for transmitting high-frequency signals and insertion of a terminal of a cable dedicated to the transmission of audio signals, the switch circuit comprising:

• a high-frequency signal switch capable of switching between passage and no passage of high-frequency signals;
• and
• an audio signal switch dedicated to switching between passage and no passage of audio signals,
• wherein a signal line from the common terminal is branched into one line connected to one end of said high-frequency signal switch and the other line connected to one end of an audio signal switch in a primary hierarchical position,
• wherein a signal line from the other end of said high-frequency signal switch is connected to a target circuit, and
• wherein a signal line from the other end of the audio signal switch in the primary hierarchical position is branched into a plurality of lines,
• the respective plurality of lines are connected to one end of a plurality of audio signal switches in a secondary hierarchical position, and
• the respective signal lines from the other end of the plurality of audio signal switches in the secondary hierarchical position are connected to respective target circuits.