Rohm Co., Ltd.

Nippon Shokubai Co., Ltd.

Other

Rohm Co., Ltc.

Hiroki Inoue

Yoshio Irie

Katsuyuki Wada

Kozo Nogi

Yorimichi Dairoku

Kenji Kadonaga

Hirotama Fujimaru

Yoshifumi Adachi

Motohiro Imura

Kotaro Iwata

Zhencheng Jin

Kunihiko Ishizaki

Kazushi Torii

Kinya Nagasuna

Shigeru Sakamoto

Shinichi Fujino

Koji Miyake

Yasuhiro Fujita

Sayaka Machida

Makoto Yasusaka

Yoshiro Mitsukami

Taku Iwamura

Masazumi Sasabe

Masatoshi Nakamura

Masatoshi Yoshida

Kenji Tada

Toshimasa Kitayama

Hirofumi Shibata

Masuji Izubayashi

Makoto Nagasawa

Akiko Mitsuhashi

Kazutomo Takahashi

Kazuhiko Nishimura

Nobuhiro Nishikawa

A power supply circuit, includes: an N-channel depletion type output transistor connected between an input terminal of an input voltage and an output terminal of an output voltage; and an operational amplifier configured to control a gate of the output transistor so that a feedback voltage corresponding to the output voltage matches a reference voltage.

Power supply circuit, power supply device, and motor vehicle including the same

A power supply circuit according to the present invention includes, for example, an output circuit arranged to generate a stabilized voltage from an input voltage using an output transistor, a filter circuit arranged to smooth the stabilized voltage using a resistor and a capacitor so as to generate an output voltage, and a charging circuit arranged to supply charging current to the capacitor without the charging current being passed through the resistor.

Power supply circuit and power supply device

A power supply circuit that outputs via an output terminal an output voltage based on an input voltage applied to an input terminal includes: an inserted transistor of an N-channel depletion type inserted between the input terminal and an internal supply power terminal; and a regulator configured to generate the output voltage by using as a supply voltage a voltage applied to the internal supply power terminal. The gate of the inserted transistor is connected to the output terminal.

Power supply circuit, power supply device, and vehicle

A regulator circuit supplies an output voltage Vto a load. A second transistor is arranged in parallel with a first transistor, and has a relatively small size. A feedback circuit generates a first feedback signal and a second feedback signal according to the output voltage V. A first error amplifier controls the first transistor such that the first feedback signal approaches a first reference value. A second error amplifier controls the second transistor such that the second feedback signal approaches a second reference value. In a light-load state, the operation of the first error amplifier is maintained.

Regulator circuit including error amplifiers respectively controlling transistors having different sizes according to state of load

A linear power supply () includes a P-channel (or PNP) first output transistor () connected between an input terminal of an input voltage (Vin) and an output terminal of an output voltage (Vout), an N-channel (or NPN) second output transistor () connected in parallel to the first output transistor (), and a control circuit () that switches between a first mode and a second mode according to the input voltage (Vin), in which the first mode uses the first output transistor () while the second mode uses the second output transistor () as an output transistor that generates the output voltage (Vout) from the input voltage (Vin).

Linear power supply and electronic apparatus using same

A linear power supply circuit includes a first output transistor of a P-channel type or pnp type which is connected between an input terminal to which an input voltage is input and an output terminal from which an output voltage is output; a first differential amplifier configured to amplify a difference between the output voltage or a feedback voltage according to the output voltage and a predetermined first reference voltage and output a first amplification voltage; a second differential amplifier configured to amplify a difference between the input voltage or a first monitor voltage according to the input voltage and the output voltage or a second monitor voltage according to the output voltage and output a second amplification voltage; and a first driver configured to generate a control voltage of the first output transistor according to the first amplification voltage and the second amplification voltage.

Linear power supply circuit

There are disclosed a water-absorbent resin composition and its production process, wherein the water-absorbent resin composition causes little gel-blocking and is excellent in the liquid permeability and liquid diffusibility and is high also in the absorption performances and further is strong also against the physical damage; and there are further disclosed a water-absorbent resin composition and its production process, wherein the water-absorbent resin composition has the following further advantages, in addition to the above, of involving little segregation of the metal compound and further having a dust prevention effect. One of water-absorbent resin compositions according to the present invention is a water-absorbent resin composition comprising water-absorbent resin particles obtained by polymerizing a monomer including acrylic acid and/or its salt, with the composition having a mass-average particle diameter of 100 to 600 &#x3bc;m and comprising water-soluble polyvalent metal salt particles and the water-absorbent resin particles that have been surface-crosslinked.

Water-absorbent resin composition and its production process

A regulator circuit stabilizes the input voltage applied to an input terminal before outputting the output voltage via an output terminal. An output transistor is provided between the input terminal and the output terminal. An error amplifier adjusts the voltage applied to the control terminal of the output transistor such that a voltage that corresponds to the output voltage approaches a predetermined reference voltage. A fluctuation detection capacitor is provided on a path from the input terminal to the grounded terminal. One terminal of the fluctuation detection capacitor is set to a fixed electric potential. In a case that the input voltage is lower than the voltage at the other terminal of the fluctuation detection capacitor, an undershoot suppressing circuit forcibly reduces the gate voltage of the output transistor.

Regulator circuit and car provided with the same

An output transistor is provided between an input terminal and an output terminal. An error amplifier adjusts the gate voltage of the output transistor such that the voltage that corresponds to the output voltage approaches a predetermined reference voltage. A fluctuation detection capacitor is provided on a path from the input terminal to a grounded terminal, which sets one terminal thereof to a fixed voltage. A current feedback circuit supplies, to the gate of the output transistor, the current that corresponds to the current that flows through the fluctuation detection capacitor. A clamp circuit clamps the gate voltage of the output transistor. The clamp circuitclamps the gate voltage of the output transistor such that the voltage difference between the gate of the output transistor and the input terminal exhibits a predetermined clamp voltage or more.

The present invention relates to a method for continuous production of a water-absorbent resin by use of an continuous polymerization device having a charge part of a monomer aqueous solution; an endless belt on which the monomer and a hydropolymer formed are conveyed; and a discharge part of the hydropolymer, wherein the continuous polymerization device has side walls and a ceiling, and the space ratio in the device represented by the equation, 'space ratio in the device=B/A', is in the range of 1.2 to 20. In the equation, A is a maximum cross-sectional area (cm) of the hydropolymer during the polymerization in the width direction of the endless belt, and B is a maximum cross-sectional area (cm) of the space between the endless belt of the continuous polymerization device and the ceiling of the continuous polymerization device in the width direction of the endless belt.

Method for continuous production of water-absorbent resin

A particulate water absorbing agent of the present invention includes a water absorbent resin, having a cross-linking structure, whose surface has been cross-linked by adding a surface treatment agent, wherein: (i) a mass average particle diameter (D50) ranges from 200 to 600 &#x3bc;m and 95 to 100 wt % of a particulate water absorbing agent whose particle diameter ranges from less than 850 &#x3bc;m to not less than 150 &#x3bc;m is contained with respect to 100 wt % of whole the particulate water absorbing agent, and (ii) a logarithmic standard deviation (&#x3c3;&#x3b6;) of particle size distribution ranges from 0.25 to 0.45, and (iii) a compressibility rate defined by a following equation ranges from 0 to 18%, and (iv) a surface tension of a supernatant liquid obtained in 4 minutes after dispersing 0.5 g of the particulate water absorbing agent in 50 ml of physiological saline whose temperature is 20&#xb0; C. is 55 mN/m or more,the compressibility rate (%)=()/

Particulate water absorbent agent and production method thereof, and water absorbent article

A particulate water absorbing agent of the present invention includes a water absorbent resin, having a cross-linking structure, whose surface has been cross-linked by adding a surface treatment agent, wherein: (i) a mass average particle diameter (D) ranges from 200 to 600 &#x3bc;m and 95 to 100 wt % of a particulate water absorbing agent whose particle diameter ranges from less than 850 &#x3bc;m to not less than 150 &#x3bc;m is contained with respect to 100 wt % of whole the particulate water absorbing agent, and (ii) a logarithmic standard deviation (&#x3c3;&#x3b6;) of particle size distribution ranges from 0.25 to 0.45, and (iii) a compressibility rate defined by a following equation ranges from 0 to 18%, and (iv) a surface tension of a supernatant liquid obtained in 4 minutes after dispersing 0.5 g of the particulate water absorbing agent in 50 ml of physiological saline whose temperature is 20&#xb0; C. is 55 mN/m or more,the compressibility rate (%)=()/&#xd7;100where P represents a tapped bulk density of the particulate water absorbing agent and A represents a loose bulk density of the particulate water absorbing agent.

A regulator circuit is provided which suppresses a variation in output voltage upon occurrence of a variation in input voltage or output current without any increase in steady-state power consumption.

Regulator circuit capable of detecting variations in voltage

A water-absorbent resin composition excelling in an absorption capacity under pressure, a first transition of initial absorption, and the small amount of rewet is provided. It comprises a water-absorbent resin obtained by aqueous solution polymerization and by reversed-phase suspension or reversed-phase emulsion polymerization and shows a CSF of not less than 20 g/g or an AAP of not less than 20 g/g or an SFC of not less than 10 (unit: 10&#xd7;cm&#xd7;s&#xd7;g). The gaps among resin particles owing to the difference in shape form optimum gap widths for the sake of capillarity. The resin composition consequently formed, therefore, manifests such excellent properties without the influences of a surfactant or an emulsifier.

Growing community of inventors

Kyoto, Japan

Hiroki Inoue