Abstract: An output unit outputs a trip current based on current amount data obtained by sampling a current amount at a first end of a power line at a predetermined timing and current amount data received from a device at a second end of the power line. A clock generating unit generates a clock to be used as a reference for the predetermined timing. A receiving unit receives a GPS signal and extracts a time synchronization signal from the GPS signal. A correction-signal generating unit generates a correction signal for synchronizing the clock with the time synchronization signal. A correcting unit corrects the clock with the correction signal.

Abstract: An output unit outputs a trip current based on current amount data obtained by sampling a current amount at a first end of a power line at a predetermined timing and current amount data received from a device at a second end of the power line. A clock generating unit generates a clock to be used as a reference for the predetermined timing. A receiving unit receives a GPS signal and extracts a time synchronization signal from the GPS signal. A correction-signal generating unit generates a correction signal for synchronizing the clock with the time synchronization signal. A correcting unit corrects the clock with the correction signal.

Abstract: A detector comprises a first diode for detecting a high-frequency signal applied to the detector, a bias unit for supplying a predetermined bias voltage to the first diode; a first resistor having an end connected to the bias unit and another end connected to the first diode, a second diode connected in series with the first diode and having a same characteristic as the first diode, a second resistor having an end connected to the second diode and another end connected to a ground, and a detected voltage output terminal directly connected to a junction between the first diode and the second diode. The sum of a detected voltage generated by the first diode and a DC offset voltage caused by the bias voltage appears at the detected voltage output terminal. The first resistor has a resistance value different from that of the second resistor, and those resistance values are set to compensate for variations in the detected voltage with temperature.

Abstract: A second drain voltage switch is provided to turn ON/OFF a drain voltage in an amplifier in the final stage, the drain voltage in the amplifier in the final stage is turned ON when large output power is required, and the drain voltage in the amplifier in the final stage is turned OFF when small output power is required, thus a transmission output control apparatus capable of controlling output power in a wide range being obtained.

Abstract: A mobile communication information terminal apparatus comprises a mobile mainframe; a radio portion which is provided in the mainframe for transmitting and receiving via a radio channel; a control portion which is provided in the mainframe and connected to the radio portion for transmitting and receiving communication information; an operating portion which is provided in the mainframe for providing the communication information with the control portion by an operation from outside; a storage portion which is provided in the main frame for storing the communication information; an antenna attachment portion which is provided on a surface of the mainframe; a helical antenna which is provide in the antenna attachment portion and electrically connected to the radio portion; a combination antenna/touch pen comprising an electrical conductor portion having a predetermined length, which is attached into the antenna attachment portion along with a central axis of the helical antenna, wherein a tip of the combination