Ams Ag

Nippon Chemi-con Corporation

Daisuke Horii

Katsuhiko Naoi

Shuichi Ishimoto

Wako Naoi

Satoru Tsumeda

Shunzo Suematsu

A multi-level capacitive digital-to-analog converter, comprises at least one capacitor switch circuit () including a differential operational amplifier () having a first input node (E) and a second input node (E). A first current path () is coupled to a first reference input terminal (E) to apply a first reference potential (RefP) and the second current path () is coupled to a second reference input terminal (E) to apply a second reference potential (RefN). The at least one capacitor switch circuit () comprises a first controllable switch () being arranged between the second input node (E) of the differential operational amplifier () and the first current path (). The at least one capacitor switch circuit () comprises a second controllable switch () being arranged between the first input node (E) of the differential operational amplifier () and the second current path ().

Multi-level capacitive digital-to-analog converter for use in a sigma-delta modulator

An integrator circuit () for use in a sigma-delta modulator () comprises a differential operational amplifier () with a first input node (E) and a second input node (E). The first input node (E) of the differential operational amplifier () is connected to a first current path () and the second input node (E) of the differential operational amplifier () is connected to a second current path (). A first controllable switch () is arranged between the second input node (E) of the differential operational amplifier () and the first current path (). A second controllable switch () is arranged between the first input node (E) of the differential operational amplifier () and the second current path (). A third controllable switch () is arranged between a reference potential (RP) and the first current path (). A fourth controllable switch () is arranged between the reference potential (RP) and the second current path ().

Integrator circuit for use in a sigma-delta modulator

Provided are an electrode formed by mixing carbon powder and a fibrous carbon, wherein influence of a resin-based binder or the like and an conductivity promoting material or the like is eliminated to have low electric resistance and an excellent property of capacitance; an electric double-layer capacitor using the electrodes; and a manufacturing method of the electrode. Provided is a dispersion step in which the carbon powder with a particle size of less than 100 nm and the fibrous carbon are dispersed into a solvent. The dispersion step is to allow jets of the solution to collide with each other or to apply shear stress and centrifugal force to the solution, thereby dispersing the carbon powder and the fibrous carbon. Furthermore, the method comprises the sheet electrode forming step in which the solution subjected to the dispersion step is filtered to obtain the carbon powder/fibrous carbon sheet.

Electrode, electric double-layer capacitor using the same, and manufacturing method of the electrode

A method of manufacturing a composite materials in which a carbon material and a metal compound can maintain a nanosized form as a final product is realized, and a method for manufacturing a superior electrode material is provided. A metal compound precursor is formed from a metal compound material source, and a mixture of the metal compound precursor and a carbon material is calcinated. In the treatment to form the precursor, a treatment of absorbing one of the metal compound material sources to the functional group of the carbon material and a treatment of producing on the carbon material a treatment of reacting the remaining material source of the adsorbed metal compound material source on the carbon material to produce a metal compound precursor are performed in separate steps.

Growing community of inventors

Tokyo, Japan

Daisuke Horii