Patent ID: 7650124

Claim:
An electronic circuit comprising: a first high-frequency circuit that has first and second input terminals serving as differential input terminals; a second high-frequency circuit that has a first output terminal serving as an unbalanced output terminal; a third high-frequency circuit that has second and third output terminals serving as balanced output terminals; and a switch circuit that, in a first mode where the second high-frequency circuit is connected to the first high-frequency circuit, couples the first output terminal of the second high-frequency circuit to the first input terminal of the first high-frequency terminal and grounds the second input terminal of the first high-frequency terminal, and, in a second mode where the third high-frequency circuit is connected to the first high-frequency circuit, couples the second output terminal of the third high-frequency circuit to the first input terminal of the first high-frequency circuit and couples the third output terminal to the second input terminal.