Abstract: A light source device for an endoscope system comprises a light source unit, which collects light with a lens and allows the collected light to enter a light guide provided to an endoscope. The light source device comprises a receiving unit and a lens barrel (movable unit). The receiving unit receives insertion of the light guide. The receiving unit is attached to the lens barrel. The lens barrel moves in a direction perpendicular to a direction of the insertion of the light guide, in accordance with a force received by the receiving unit from the light guide. The light source unit applies collimated light to the lens. The lens is attached to the lens barrel and moves together with the receiving unit and the lens barrel, and makes at least a part of the collimated light enter the light guide.

Abstract: A low-power and high-speed ADC includes: a successive approximation converter circuit configured to sequentially compare and coarsely convert the analog input signal voltage into a digital signal with a number of higher-order bits, and also to output a residual voltage; a fixed-quantity change time measurement converter circuit configured to finely convert the residual voltage into a digital signal with a number n of lower-order bits by changing the residual voltage at a fixed rate of change and by measuring the time until a predetermined value is reached; and an encoder circuit configured to generate a digital signal with the predetermined number of bits by combining the digital signal with the number of higher-order bits output from the successive approximation converter circuit and the digital signal with the number of lower-order bits output from the fixed-quantity change time measurement converter circuit.

Abstract: A gain control circuit includes: a voltage generation circuit that generates first voltage that is linearly changed over time; a voltage square circuit that outputs second voltage that is obtained by squaring the first voltage generated by the voltage generation circuit; a resistance circuit that has a resistance characteristic by which a resistance value is squared-changed over time depending on the second voltage output from the voltage square circuit; and a gain adjustment circuit in which gain is squared-changed over time depending on the resistance value of the resistance circuit.

Abstract: An induction heating device and an induction heating method are provided. The entire areas to be heated of the workpiece, even a large workpiece, can be readily and approximately uniformly heated to a predetermined high temperature, and uniform heating is possible even when the workpiece deforms in a non-uniform manner during heating. When areas to be heated H1, H2 are established on a workpiece W so as to extend in one direction and the areas to be heated H1, H2 are induction-heated, the deformation amount on one edge of the areas to be heated H1, H2 is different from that on the other. This induction heating device includes: heating coils 451 facing a portion of the areas to be heated H1, H2 when the workpiece W is induction-heated; and a relative transfer means for transferring the workpiece W and the heating coils 451 along one direction in a relative manner, and the heating coils 451 are disposed so as to correspond to the areas to be heated H1, H2 during the heating period.

Abstract: A low-power and high-speed ADC includes: a successive approximation converter circuit configured to sequentially compare and coarsely convert the analog input signal voltage into a digital signal with a number of higher-order bits, and also to output a residual voltage; a fixed-quantity change time measurement converter circuit configured to finely convert the residual voltage into a digital signal with a number n of lower-order bits by changing the residual voltage at a fixed rate of change and by measuring the time until a predetermined value is reached; and an encoder circuit configured to generate a digital signal with the predetermined number of bits by combining the digital signal with the number of higher-order bits output from the successive approximation converter circuit and the digital signal with the number of lower-order bits output from the fixed-quantity change time measurement converter circuit.

Abstract: A glyceryl ascorbic acid acylated derivative or its salt, which has an ascorbic acid structure where 2- and/or 3-positions of the structure are substituted with glyceryl groups and some of the hydroxyl groups in the structure and/or in the glyceryl group are acylated, a production method of the glyceryl ascorbic acid acylated derivative and a cosmetic containing the glyceryl ascorbic acid acylated derivative or its salt are provided.

Abstract: A successive approximation register analog-to-digital converter includes: a digital-to-analog converter to generate an analog voltage based on an input voltage sampled in accordance with a sampling clock and a digital code; a comparator to receive the analog voltage; a controller to generate the digital code based on an output of the comparator; a delay circuit to delay a signal based on the output of the comparator and to feed back the delayed signal to a reset terminal of the comparator; an adjustment circuit to count a number of edges of a signal generated in a loop that feeds back the delayed signal, and to adjust an amount of delay of the delay circuit based on a count value; and a sampling clock generation circuit to generate the sampling clock based on the signal generated in the loop and the external clock signal.

Abstract: A method for regenerating a titanosilicate catalyst, comprising a step of mixing a titanosilicate having reduced catalytic ability with a cyclic secondary amine, and a method for producing an oxirane compound, which comprises a step of reacting hydrogen peroxide with a C2-C12 compound having a carbon-carbon double bond, in the presence of a titanosilicate catalyst obtained by the regeneration method.

Abstract: A cosmetic base material composed of a peptide or peptide derivative having one or more acidic amino acid as the constituent amino acid and in which at least some of anionic functional groups thereof form an ion complex with at least one surfactant selected from the group consisting of cationic surfactants and ampholytic surfactants.

Abstract: A successive approximation register analog-to-digital converter includes: a digital-to-analog converter that generates an analog voltage based on a digital code; a comparator that receives the analog voltage; a control circuit that generates a digital code of an input voltage sampled from an external clock signal by successively changing the digital code based on a comparison result of the comparator; a delay circuit that resets the comparator based on a signal transition generated by delaying the comparison result; and an adjustment circuit that counts a value indicating a number of the signal transition being generated during a cycle of the external clock signal and adjusts a delay of the delay circuit according to a counted value.

Abstract: Disclosed is an ascorbic acid derivative or a salt thereof wherein at least one of hydrogen atoms in hydroxy groups at the 2-position and the 3-position of ascorbic acid is substituted by R—O—CH2—CH(OH)—CH2—, R—O—CH2—CH(CH2OH)—, R—CH(CH2OH)—, R—CH(OH)—CH2— (wherein R represents an alkyl group, an alkenyl group or a phenyl group), or a hydroxycyclohexyl group. Also disclosed is a method for producing an ascorbic acid derivative or a salt thereof, which is characterized by reacting ascorbic acid with an epoxy compound such as an alkyl glycidyl ether, an epoxy alkane or an alicyclic epoxy.

Abstract: A successive approximation register analog-to-digital converter includes: a digital-to-analog converter to generate an analog voltage based on an input voltage sampled in accordance with a sampling clock and a digital code; a comparator to receive the analog voltage; a controller to generate the digital code based on an output of the comparator; a delay circuit to delay a signal based on the output of the comparator and to feed back the delayed signal to a reset terminal of the comparator; an adjustment circuit to count a number of edges of a signal generated in a loop that feeds back the delayed signal, and to adjust an amount of delay of the delay circuit based on a count value; and a sampling clock generation circuit to generate the sampling clock based on the signal generated in the loop and the external clock signal.

Abstract: A D/A converter includes plus-side and minus-side input terminals; plus-side and minus-side D/A converters each including plural plus-side or minus-side capacitors having capacitance values weighted by the powers of two, a plus-side or minus-side output terminals connected to first electrodes of the plus-side or minus-side capacitors, and plural plus-side or minus-side switches for connecting each second electrode of the plus-side or minus-side capacitors to either the plus-side or minus-side input terminal, a plus-side reference voltage terminal or a minus-side reference voltage terminal according to plus-side or minus-side control digital signals; and plural short-circuit switches provided between identically weighted plus-side and minus-side capacitors respectively.

Abstract: A comparator circuit includes a first comparator comparing an input signal to a first comparison value and generating a first determination signal, a second comparator comparing the input signal to a second comparison value different from the first comparison value and generating a second determination signal, and an output selecting circuit selecting a signal generated first from the first determination signal and the second determination signal, and outputting the selected signal as a determination signal.

Abstract: A sample-hold circuit includes a voltage-current converter, having a first input terminal pair to which an input differential signal is input and a first output terminal pair which outputs current according to the voltage of the input differential signal, a spreading switch having a switch group which switches the first output terminal pair to inverting or non-inverting states, and an integrator having a second input terminal pair coupled to the first output terminal pair via the spreading switch, an output amplifier which outputs to a second output terminal pair an output differential signal amplified according to the differential signal at the second input terminal pair, a capacitor pair which is provided respectively between the second input terminal pair and second output terminal pair, and which is charged or discharged by current input to the second input terminal pair, and a reset circuit which resets charge states of the capacitor pair.

Abstract: A successive approximation register analog-to-digital converter includes: a digital-to-analog converter that generates an analog voltage based on a digital code; a comparator that receives the analog voltage; a control circuit that generates a digital code of an input voltage sampled from an external clock signal by successively changing the digital code based on a comparison result of the comparator; a delay circuit that resets the comparator based on a signal transition generated by delaying the comparison result; and an adjustment circuit that counts a value indicating a number of the signal transition being generated during a cycle of the external clock signal and adjusts a delay of the delay circuit according to a counted value.

Abstract: Disclosed is an ascorbic acid derivative or a salt thereof wherein at least one of hydrogen atoms in hydroxy groups at the 2-position and the 3-position of ascorbic acid is substituted by R—O—CH2—CH(OH)—CH2—, R—O—CH2—CH(CH2OH)—, R—CH(CH2OH)—, R—CH(OH)—CH2— (wherein R represents an alkyl group, an alkenyl group or a phenyl group), or a hydroxycyclohexyl group. Also disclosed is a method for producing an ascorbic acid derivative or a salt thereof, which is characterized by reacting ascorbic acid with an epoxy compound such as an alkyl glycidyl ether, an epoxy alkane or an alicyclic epoxy.

Abstract: A D/A converter includes plus-side and minus-side input terminals; plus-side and minus-side D/A converters each including plural plus-side or minus-side capacitors having capacitance values weighted by the powers of two, a plus-side or minus-side output terminals connected to first electrodes of the plus-side or minus-side capacitors, and plural plus-side or minus-side switches for connecting each second electrode of the plus-side or minus-side capacitors to either the plus-side or minus-side input terminal, a plus-side reference voltage terminal or a minus-side reference voltage terminal according to plus-side or minus-side control digital signals; and plural short-circuit switches provided between identically weighted plus-side and minus-side capacitors respectively.

Abstract: A method for producing an optical member from a nanocomposite material which includes a thermoplastic resin containing inorganic fine particles is provided. The method includes: a first step of preparing in a solution the thermoplastic resin containing the inorganic fine particles; a second step of drying and solidifying the solution containing the prepared thermoplastic resin to produce the nanocomposite material having a specific surface area (surface area/volume) of 15 mm?1 or more; and a third step of heat-compressing the produced nanocomposite material to form the optical member in a desired shape.

Abstract: A method for molding an optical member from a material of a nanocomposite resin which includes a thermoplastic resin containing inorganic fine particles is provided. The method includes: charging a solution containing a solvent and the nanocomposite resin into a vessel providing at least an optical surface shape and an opening to an atmosphere, and evaporating the solvent from the opening to solidify and form an optical surface of the optical member into a finished shape.