Abstract: A bias supply circuit includes a first inductor connected between a bias supply terminal that supplies a bias voltage to an amplifier and a power supply terminal connected to a power supply, a second inductor connected in series with the first inductor between the bias supply terminal and the power supply terminal and connected between the first inductor and the power supply terminal, a first capacitor shunt-connected to a first node between the first inductor and the second inductor, and a second capacitor shunt-connected to a second node between the second inductor and the power supply terminal.

Abstract: A semiconductor device includes a semiconductor chip, and a package including an accommodating portion that houses the semiconductor chip, and a first flange and a second flange arranged along a first direction with the accommodating portion interposed therebetween. A lower surface of a first end portion of the first flange is positioned above a mounting surface of the accommodating portion, and a first distance between the lower surface of the first end portion and the mounting surface in a second direction is equal to or greater than a second distance between an upper surface of a second end portion of the second flange and the mounting surface in the second direction. The first end portion has a 10 first opening or a first notch penetrating the first end portion, and the second end portion has a second opening or a second notch penetrating the second end portion.

Abstract: A directional coupler includes a transmission line, and a coupling line, the transmission line being coupled with the coupling line. The transmission line is located at a height position different from that of the coupling line with respect to a reference plane. The transmission line and the coupling line have portions that do not overlap each other.

Abstract: A directional coupler includes a transmission line, and a coupling line, the transmission line being coupled with the coupling line. The transmission line is located at a height position different from that of the coupling line with respect to a reference plane. The transmission line and the coupling line have portions that do not overlap each other.

Abstract: A frequency dividing circuit includes a first inverter circuit supplied with a first frequency-divided signal, a second inverter circuit supplied with a second frequency-divided signal which has a complementary relationship to the first frequency-divided signal, and a first pair of push-pull circuits. There are also provided a first switch circuit performing a first switching operation in response to a first input signal and selectively supplying output signals of the first and second inverter circuits to the first pair of push-pull circuits so that one of the first pair of push-pull circuits performs a pull-up operation when the other one thereof performs a pull-down operation.