Patent ID: 7692472
Filing Date: 2010-04-06
Classification: H01P,H03K

Abstract:
1. A high-frequency switching circuit comprising: a semiconductor substrate; at least one semiconductor switching device provided on the semiconductor substrate and including a gate terminal; a gate electrode pad arranged on the semiconductor substrate to receive a control voltage to be applied to the gate terminal of the at least one semiconductor switching device; a gate wiring pattern provided on the semiconductor substrate and arranged to connect the gate electrode pad and the gate terminal; a first resistor connected in series with a first portion of the gate wiring pattern adjacent to the gate terminal of the at least one semiconductor switching device with no other circuit elements disposed on the gage wiring pattern between the first resistor and the gate terminal; and a second resistor connected in series with a second portion of the gate wiring pattern, said second resistor including a first end being disposed closer to the gate electrode pad than a second end of the second resistor, the first end of the second resistor being connected with a first end of the gate electrode pad by the second portion of the gate wiring pattern with no other circuit elements disposed on the gate wiring pattern between the second resistor and the gate electrode pad; wherein a third portion of the gate wiring pattern is arranged to receive spurious signals from and to be adjacent to a source electrode and a drain electrode of the at least one semiconductor switching device; the first resistor and the second resistor and the corresponding first and second portions of said gate wiring pattern are disposed respectively on opposite sides of the source electrode and the drain electrode of the at least one semiconductor switching device; and a distance between the first end of the second resistor and the first end of the gate electrode pad is about 200 μm or less.