Abstract: A wireless communication module comprising including a first transmission bandpass filter that takes a first transmit frequency band as a passband; a second transmission bandpass filter that takes a second transmit frequency band as a passband; a first reception bandpass filter that takes a first receive frequency band as a passband; a second reception bandpass filter that takes a second receive frequency band as a passband; and a plurality of switches, each switch connected to a single one of the bandpass filters.

Abstract: An electronic device including a first reception band pass filter having a first reception frequency set as a passband; a second reception band pass filter having a second reception frequency set as a passband; a first matching circuit having a first end connected to an antenna terminal; a first switch having a first end connected to a second end of the first matching circuit: a second switch having a first end connected to the second end of the first matching circuit; a second matching circuit connected between a second end of the first switch and the first reception band pass filter; and a third matching circuit connected between a second end of the second switch and the second reception band pass filter, wherein at least one of the first, second, and third matching circuits is a variable matching circuit having a controllable matching constant.

Abstract: A portable electronic device including a battery, a direct current (DC) power source, a first device that consumes a first amount of power during operation, a second device that consumes a second amount of power during operation, the second amount of power being more than the first amount of power, a first switch provided in a charging path between the DC power source and the battery, a second switch provided in a path for supplying power from the battery to the second device, and a charging control circuit that controls charging the battery by connecting the first switch when external power is supplied via the DC power source, and control the second switch to be connected and the first switch to be disconnected when the second device is operated during the charging.

Abstract: An electronic device including a first reception band pass filter having a first reception frequency set as a passband; a second reception band pass filter having a second reception frequency set as a passband; a first matching circuit having a first end connected to an antenna terminal; a first switch having a first end connected to a second end of the first matching circuit: a second switch having a first end connected to the second end of the first matching circuit; a second matching circuit connected between a second end of the first switch and the first reception band pass filter; and a third matching circuit connected between a second end of the second switch and the second reception band pass filter, wherein at least one of the first, second, and third matching circuits is a variable matching circuit having a controllable matching constant.

Abstract: A portable electronic device including a battery, a direct current (DC) power source, a first device that consumes a first amount of power during operation, a second device that consumes a second amount of power during operation, the second amount of power being more than the first amount of power, a first switch provided in a charging path between the DC power source and the battery, a second switch provided in a path for supplying power from the battery to the second device, and a charging control circuit that controls charging the battery by connecting the first switch when external power is supplied via the DC power source, and control the second switch to be connected and the first switch to be disconnected when the second device is operated during the charging.