Patent ID: 6904271
Filing Date: 2005-06-07
Classification: H03G

Abstract:
1. A high-frequency-signal switching circuit comprising: a first high-frequency-signal path including: a second high-frequency-signal path including a third diode connected in series between the high-frequency-signal input end and the high-frequency-signal output end; and a switching-voltage supply section to switch the high-frequency amplifier stage between an operation state and an non-operation state, and to switch the first, second and third diodes between an ON state and an OFF state, wherein, when a switching voltage of the switching-voltage supply section has a first value, the high-frequency amplifier stage is in the operation state, the first and second diodes are in the ON state, and the third diode is in the OFF state, so that a high-frequency signal is transferred through the first high-frequency-signal path, and when the switching voltage of the switching-voltage supply section has a second value, the high-frequency amplifier stage is in the non-operation state, the first and second diodes are in the OFF state, and the third diode is in the ON state, so that a high-frequency signal is transferred through the second high-frequency-signal path.