Abstract: A wireless communication network system (1) comprising a sensor device (10) transmitting detected data, one or a plurality of relay devices (100) relaying the data, and a gateway device (11) transferring the data to another network, wherein the sensor device, the relay device, and the gateway device being connected by a wireless communication network, wherein the relay device comprising: a receiver (101) receiving a received signal containing the data; a storage (104) storing heartbeat data; a transmitter (102) transmitting a transmission signal containing the data received by the receiver and periodically transmitting a transmission signal containing the heartbeat data; and a frequency setting unit (103) directing to set a frequency of the received signal received by the receiver and/or a frequency of the transmission signal transmitted from the transmitter based on a frequency setting command transmitted from the gateway device.

Abstract: A battery-embedded device includes a substrate having a wiring, a coil fixed to the substrate, a battery fixed to the substrate, and a first temperature detecting element that is disposed on the substrate and configured to detect a temperature of the battery. An occupancy rate of the wiring in a first region of the substrate which is immediately below the first temperature detecting element is lower than an occupancy rate of the wiring in a second region of the substrate other than the first region.

Abstract: A communication device includes: a board having a first surface, a second surface opposite to the first surface, and a third surface different from both the first surface and the second surface; a first magnetic sheet disposed on a side of the first surface; a first coil disposed on the first magnetic sheet; a second magnetic sheet disposed on a side of the second surface; a second coil disposed on the second magnetic sheet; and a third coil disposed on the third surface. A part of the first magnetic sheet overlaps at least a part of the third coil in plan view.

Abstract: A communication device includes a substrate, a magnetic sheet disposed above an upper surface of the substrate, a first coil disposed above an upper surface of the magnetic sheet, a second coil having a portion facing an edge surface of the substrate in a direction parallel with the upper surface of the substrate, and an electronic component disposed on the upper surface of the substrate. The electronic component is configured to generate noise. The magnetic sheet has a portion overlapping the second coil viewing from above. The electronic component is exposed from the magnetic sheet viewing from above. This communication device has a small size and prevents influence of noise generated by the electronic component.

Abstract: A communication device includes: a board having a first surface, a second surface opposite to the first surface, and a third surface different from both the first surface and the second surface; a first magnetic sheet disposed on a side of the first surface; a first coil disposed on the first magnetic sheet; a second magnetic sheet disposed on a side of the second surface; a second coil disposed on the second magnetic sheet; and a third coil disposed on the third surface. A part of the first magnetic sheet overlaps at least a part of the third coil in plan view.

Abstract: A battery-embedded device includes a substrate having a wiring, a coil fixed to the substrate, a battery fixed to the substrate, and a first temperature detecting element that is disposed on the substrate and configured to detect a temperature of the battery. An occupancy rate of the wiring in a first region of the substrate which is immediately below the first temperature detecting element is lower than an occupancy rate of the wiring in a second region of the substrate other than the first region.

Abstract: A communication device includes a substrate, a magnetic sheet disposed above an upper surface of the substrate, a first coil disposed above an upper surface of the magnetic sheet, a second coil having a portion facing an edge surface of the substrate in a direction parallel with the upper surface of the substrate, and an electronic component disposed on the upper surface of the substrate. The electronic component is configured to generate noise. The magnetic sheet has a portion overlapping the second coil viewing from above. The electronic component is exposed from the magnetic sheet viewing from above. This communication device has a small size and prevents influence of noise generated by the electronic component.

Abstract: A communication device includes: a board having a first surface, a second surface opposite to the first surface, and a third surface different from both the first surface and the second surface; a first magnetic sheet disposed on a side of the first surface; a first coil disposed on the first magnetic sheet; a second magnetic sheet disposed on a side of the second surface; a second coil disposed on the second magnetic sheet; and a third coil disposed on the third surface. A part of the first magnetic sheet overlaps at least a part of the third coil in plan view.

Abstract: A conveyor belt take-up drum includes spacers of substantially the same length as the width of a conveyor belt being taken up onto a core section are detachably provided between opposing outer ends of main radial direction members of flange sections linked to circumferential direction members on which ground-contacting sections are provided, the bending rigidity near joints between the core section and inner ends of the opposing main radial direction members is set lower than the bending rigidity of the main bodies of the main radial direction members, and the conveyor belt taken up onto the core section is sandwiched between the main radial direction members, putting the main radial direction members, the spacers, and the conveyor belt into an integrated state.

Abstract: A constant-voltage circuit having an overcurrent protection circuit which includes: a first sense transistor, one main terminal connected to an input terminal of the constant-voltage circuit and a control terminal connected to a control terminal of an output transistor generates a current corresponding to an output current from the output transistor; a voltage level adjusting circuit configured to generate a voltage corresponding to a voltage of a main terminal of the output transistor at an output terminal side of the constant-voltage circuit by extracting a current that is not affected by a change in the output current from the output transistor, and adjust a voltage of another main terminal of the first sense transistor such that the adjusted voltage becomes equal to the generated voltage; and a protection circuit to control a control voltage applied from an error amplifier to the control terminal of the output transistor.

Abstract: A holding tool for conveyor belt conveyance for holding a conveyor belt in a wound-up state on a winding core comprises a cradle for placing a conveyor belt in a wound-up state and attaching members for attaching both ends of the cradle to both corresponding ends of the winding core. Furthermore, the cradle has an arc-shaped placement section that matches the outer circumferential surface of a conveyor belt in a wound-up state, and a ground-contacting section for bringing the cradle to an immovable state at a fixed position upon the cradle being placed upon a flat surface.

Abstract: A conveyor belt take-up drum includes spacers of substantially the same length as the width of a conveyor belt being taken up onto a core section are detachably provided between opposing outer ends of main radial direction members of flange sections linked to circumferential direction members on which ground-contacting sections are provided, the bending rigidity near joints between the core section and inner ends of the opposing main radial direction members is set lower than the bending rigidity of the main bodies of the main radial direction members, and the conveyor belt taken up onto the core section is sandwiched between the main radial direction members, putting the main radial direction members, the spacers, and the conveyor belt into an integrated state.

Abstract: A voltage detecting circuit including: a first current source including a first terminal connected to a first voltage input terminal; a second current source including a first terminal connected to ground potential VSS; and a first transistor including a first main terminal connected to a second terminal of the first current source, a second main terminal connected to a second terminal of the second current source and a detection output terminal, and a control terminal connected to a second voltage terminal. The first and the second current sources are configured such that a logic level of a detection output signal is determined based on whether one voltage applied to the first voltage terminal is higher or lower than a voltage obtained by adding a voltage of a difference between the first main terminal and control terminal of the first transistor to the other voltage applied to the second voltage terminal.

Abstract: A constant-voltage circuit having an overcurrent protection circuit which includes: a first sense transistor, one main terminal connected to an input terminal of the constant-voltage circuit and a control terminal connected to a control terminal of an output transistor generates a current corresponding to an output current from the output transistor; a voltage level adjusting circuit configured to generate a voltage corresponding to a voltage of a main terminal of the output transistor at an output terminal side of the constant-voltage circuit by extracting a current that is not affected by a change in the output current from the output transistor, and adjust a voltage of another main terminal of the first sense transistor such that the adjusted voltage becomes equal to the generated voltage; and a protection circuit to control a control voltage applied from an error amplifier to the control terminal of the output transistor.

Abstract: A charge pump circuit includes a clock signal input terminal to receive a clock signal; an inverted clock signal input terminal to receive an inverted clock signal having a phase obtained by reversing a phase of the clock signal; an output terminal for outputting an output voltage, the output voltage being generated by boosting the clock signal and the inverted clock signal; and a pump circuit including a plurality of rectifying circuits connected in series and located between the output terminal and a ground terminal and a plurality of capacitative elements respectively having first terminals respectively connected to anodes of the plurality of rectifying circuits, a second terminal of a last-stage capacitative element located on the output terminal side, the clock signal input terminal and the inverted clock signal input terminal being alternately connected to second terminals of the capacitative elements other than the last-stage capacitative element.

Abstract: The integrated structure of the stress sensor section with the control section facilitates the confirmation of the matching of both sections before the input device is incorporated into an electronic device. For example, it is possible to select only the input device which exhibits favorable matching as a result of the confirmation and to incorporate it in the electronic device. Therefore, with the above-described structure of the present invention, an input device that enables constantly favorable matching of both the stress sensor section and the control section can be provided.

Abstract: The integrated structure of the stress sensor section with the control section facilitates the confirmation of the matching of both sections before the input device is incorporated into an electronic device. For example, it is possible to select only the input device which exhibits favorable matching as a result of the confirmation and to incorporate it in the electronic device. Therefore, with the above-described structure of the present invention, an input device that enables constantly favorable matching of both the stress sensor section and the control section can be provided.

Abstract: An semiconductor integrated circuit that reduces the influence of noise from a digital circuit block on an analog circuit block, both the circuit blocks being integrated on the same semiconductor substrate. In the wiring that passes through near the analog circuit block and the digital circuit block, having a grounding unit that performs alternate grounding makes it possible to reduce the influence of noise from the digital circuit block on the analog circuit block.

Abstract: A switching control circuit includes a serial-to-parallel converter, a rewritable storage device, and a decoder. The serial-to-parallel converter performs serial-to-parallel conversion for converting an inputted first control signal into a first parallel signal, and outputs the first parallel signal. The rewritable storage device has a write mode and a read mode selectively switched over in response to a storage mode switching signal, stores therein data of the first parallel signal in the write mode, and outputs the stored data as a second parallel signal in the read mode. In the read mode, the decoder decodes the first control signal and the second parallel signal to generate and output a plurality of element control signals to a plurality of elements, respectively. In the write mode, the decoder holds the plurality of element control signals generated in the read mode.