Suzunaga
Hiroshi Suzunaga, Kanagawa-Ken JP
Patent application number | Description | Published |
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20080315856 | BANDGAP REFERENCE VOLTAGE GENERATOR CIRCUIT - A bandgap reference voltage generator circuit includes a substrate made of a semiconductor of a first conductivity type, a first transistor formed on the substrate, a second transistor formed on the substrate and having a base commonly connected to the base of the first transistor, a light absorption region formed on the substrate, having a second conductivity type, and connected in parallel between the collector layer of the second transistor and the substrate and a reference voltage output terminal commonly connected to the bases of the first and second transistor. The area of the collector layer of the first transistor is larger than the area of the collector layer of the second transistor. | 12-25-2008 |
Hiroshi Suzunaga, Fukuoka-Ken JP
Patent application number | Description | Published |
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20150076526 | LIGHT RECEIVING ELEMENT AND OPTICALLY COUPLED INSULATING DEVICE - A light receiving element includes: a semiconductor layer; an insulating layer; an interconnect layer; and a film. The semiconductor layer includes a light receiving unit configured to convert a signal light incident on the light receiving unit into an electrical signal. The insulating layer is provided on the semiconductor layer. The interconnect layer is provided on the insulating layer. The film is provided on the insulating layer to cover the light receiving unit and be connected to the interconnect layer, the film being made of a metal or a metal nitride. | 03-19-2015 |
20150380594 | SHIELDING FILM FOR A LIGHT RECEIVING ELEMENT AND OPTICALLY COUPLED INSULATING DEVICE - A light receiving element includes: a semiconductor layer; an insulating layer; an interconnect layer; and a film. The semiconductor layer includes a light receiving unit configured to convert a signal light incident on the light receiving unit into an electrical signal. The insulating layer is provided on the semiconductor layer. The interconnect layer is provided on the insulating layer. The film is provided on the insulating layer to cover the light receiving unit and be connected to the interconnect layer, the film being made of a metal or a metal nitride. | 12-31-2015 |
Hiroshi Suzunaga, Kitakyushu Fukuoka JP
Patent application number | Description | Published |
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20160065150 | LIGHT RECEIVING CIRCUIT AND LIGHT COUPLING DEVICE - A light receiving circuit includes an inverting amplification circuit, a first light receiving element, a first circuit, and a charging circuit. The inverting amplification circuit includes an input terminal and an output terminal. The first light receiving element is connected between the input terminal and a reference potential terminal. The first circuit includes a first resistor, a second resistor, a third resistor and a capacitor. The first resistor second resistor connected through a connection point. The first resistor is connected between the input terminal and the connection point, and the second resistor connected between the output terminal and the connection point. The third resistor is connected between the connection point and connection node, and the capacitor is connected between the connection node and the reference potential terminal. The charging circuit connected between the power supply terminal and the connection node. | 03-03-2016 |