Kabushiki Kaisha Toshiba

Toshiba Electronic Devices & Storage Corporation

Kazuki Tanaka

Naoya Takai

Mami Fujihara

Keita Saito

Yukihiro Takifuji

Yoshio Noguchi

Takenori Yasuzumi

Tsuyoshi Tokiwa

A semiconductor relay device includes a conversion circuit configured to receive an input signal from outside and pass a first current to a first node based on the input signal. A zener diode has an anode coupled to a second node and a cathode coupled to the first node. A resistor is coupled between the second node and a third node. A number n of diodes are serially coupled. A thyristor has an anode coupled to the first node, a cathode coupled to the second node, and a control terminal coupled to the third node. A transistor has a gate coupled to the first node. An anode of a diode at a first end of the n diodes is coupled to the first node, and a cathode of a diode at a second end of the n diodes is coupled to a third node.

Semiconductor relay device

An optical coupling device includes a light receiving element including a first output terminal and a second output terminal, a light emitting element provided on the light receiving element, a first switching element, a first electrode plate, and a sealing member. The first switching element includes a first main terminal connected to the first output terminal, a first control terminal connected to the second output terminal, and a second main terminal. An upper surface of the first electrode plate is connected to the second main terminal. The sealing member covers the light receiving element, the light emitting element, and the first switching element. A lower surface of the first electrode plate is exposed on a lower surface of the sealing member. The lower surface of the first electrode plate and the lower surface of the sealing member form the same plane.

Optical coupling device

An optical coupling device includes a light receiving element provided with a first output terminal and a second output terminal, a light emitting element provided on the light receiving element, a first switching element, a first electrode plate, and a sealing member. The first switching element is provided side by side on the light receiving element. A first main terminal and a control terminal are provided on an upper surface of the first switching element. A second main terminal is provided on a lower surface of the first switching element. The first main terminal is connected to the first output terminal. The control terminal is connected to the second output terminal. An upper surface of the first electrode plate is connected to the second main terminal. The sealing member covers the light receiving element, the light emitting element, and the first switching element.

Optical coupling device and high frequency device

According to one embodiment, a photocoupler includes: an input terminal; a light emitting unit; a light receiving unit and an output terminal. An input electrical signal having a prescribed voltage is input into an input terminal. The light emitting unit is connected to the input terminal, includes a light emitting element configured to emit emission light, and is configured to drive the light emitting element under a constant voltage of the input electrical signal. The light receiving unit includes a light receiving element configured to receive the emission light and convert the emission light into an electrical signal. The output terminal is insulated from the input terminal and configured to output the electrical signal in accordance with the input electrical signal.

Growing community of inventors

Kitakyushu Fukuoka, Japan

Kazuki Tanaka