摘要:
A DC-DC converter has an error amplifier that amplifies a potential difference between a first voltage based on an output voltage at the output terminal and a reference voltage, and outputs a resultant error amplified signal; a differential detecting circuit that senses an inclination of a temporal change of the output voltage by differentiating the first voltage, outputs a control signal according to a result of the sensing; and a PWM generating circuit that compares a synthetic signal obtained by conducting computation on the amplified error signal and the control signal with a periodically changing comparison signal, and outputs a PWM signal having a duty ratio controlled according to a result of the comparison.
摘要:
In a liquid supply device provided with a liquid storage chamber and a reservoir chamber, gas-liquid exchange sensitivity is made excellent to supply the liquid stably to a liquid application portion, while changes in liquid storage amount inside the liquid storage chamber are reduced even when the temperature and/or position changes. A hollow portion of a main body 1 of a writing instrument is divided into a liquid storage chamber 3 that stores the liquid and a reservoir chamber 4 communicated with the atmosphere by a partition 2 with a through hole formed in a center portion of the partition 2. The main body 1 has an application material 8 that applies the liquid inside the liquid storage chamber 3, a porous relay core 10 that supplies the liquid inside the liquid storage chamber 3 to the application material 8 and that is inserted in the through hole to form a predetermined gap G with an inner wall of the through hole, and a partition extending portion 2b which is provided in the partition 2, protrudes to the liquid storage chamber side along the relay core 10, and in which the relay core is inserted to form a predetermined gap G′. The partition extending portion 2b is provided in the partition 2 to be higher than a surface H of the liquid stored in the liquid storage chamber when the application material 8 is pointed downward.
摘要:
A semiconductor device of the present invention includes a circuit board, a semiconductor element, a resin and a level display pad. On the circuit board substrate electrodes are provided. The semiconductor element is mounted on the circuit board via the substrate electrodes. The resin fills the gap between the semiconductor element and the circuit board. The level display pad is embedded in the resin and shows the distance from the surface of the circuit board.
摘要:
A DC-DC converter has an error amplifier that amplifies a potential difference between a first voltage based on an output voltage at the output terminal and a reference voltage, and outputs a resultant error amplified signal; a differential detecting circuit that senses an inclination of a temporal change of the output voltage by differentiating the first voltage, outputs a control signal according to a result of the sensing; and a PWM generating circuit that compares a synthetic signal obtained by conducting computation on the amplified error signal and the control signal with a periodically changing comparison signal, and outputs a PWM signal having a duty ratio controlled according to a result of the comparison.
摘要:
Fixed electrodes 16a having a positive potential are disposed in positions not corresponding to the positions of print heads and covered with a dielectric layer 17. A conveyor belt 10 includes a conductor layer 11 having a negative potential and a dielectric layer 12 in the surface and has holes 13, 14 through which electrical flux lines from the fixed electrodes pass. Since electrical flux lines from the dielectric layer of the fixed electrodes pass through the holes and polarize a sheet S placed on the dielectric layer 12 of the conveyor belt 10 as well as the dielectric layer 12, the sheet is electrostatically adsorbed to the conveyor belt in the vicinity of the holes. With the movement of the conveyor belt along the fixed electrodes, the sheet is transported, while being electrostatically adsorbed to the conveyor belt. The inventive device of a simple structure provides stable adsorptive power and a stable speed of transportation and is free from ink droplet deflection by electric fields.
摘要:
A bonding sheet includes an insulating sheet with cavities formed within the insulating sheet, and adhesive-filling portions made of an electrically conductive adhesive filled in the cavities. An electronic circuit device includes an IC package mounted on a circuit board, with the bonding sheet disposed between the IC package and the circuit board. The IC package is provided with terminal electrodes in the lower surface, and electrode bumps project from the terminal electrodes. The circuit board has recesses in the upper surface, and electrode pads are formed on the bottom of the recesses. The electrically conductive adhesive that flows out from the adhesive-filling portions filled the recesses and fix the electrode bumps and the electrode pads.
摘要:
Electronic device has substrate having at least one pad, electronic component having bump connected with pad of substrate electrically and mounting on substrate by flip chip bonding, conductive resin electrically connecting pad with bump, and insulation sheet disposed between substrate and electronic component. Substrate has recess on surface opposite to electronic component. Pad is formed on recess bottom. Conductive resin is provided on pad and in recess. Sheet has through hole corresponding to each bump. Opening area of through hole is smaller than that of recess. Bump is inserted into through hole, in contact with inner wall of through hole, electrically connected with pad via conductive resin, without direct contact with pad.
摘要:
An image forming machine includes an image data memory, an image data mapper, and a printer. For an envelope, the image data memory stores image data to be printed on a back of the body and a face of the flap, as backside image data. Based on this data, the image data mapper generates print data including a first print data to be printed on the body back and a second print data to be printed on the flap face. The printer prints a part of the backside image data on the body back in accordance with the first print data, and a remaining part of the backside image data on the flap face in accordance with the second print data.