Stereo camera device
US-11302020-B2 · Apr 12, 2022 · US
Semiconductor relay device
US12494781B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-12494781-B2 |
| Application number | US-202418413737-A |
| Country | US |
| Kind code | B2 |
| Filing date | Jan 16, 2024 |
| Priority date | Mar 23, 2021 |
| Publication date | Dec 9, 2025 |
| Grant date | Dec 9, 2025 |
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- Title
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- Abstract
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- Assignees and inventors
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- Key dates
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- First independent claim
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- CPC / IPC classifications
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- Citations and related patents
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Abstract
Official abstract text for this publication.
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.
First claim
Opening claim text (preview).
The invention claimed is: 1 . A semiconductor relay device comprising: 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; an overheat protection circuit provided between the first node and a second node and configured to short the first node to the second node while a temperature in the semiconductor relay device is higher than a predetermined temperature; and a transistor having a gate coupled to the first node, wherein the overheat protection circuit includes: a zener diode having an anode coupled to the second node and a cathode coupled to the first node; a resistor coupled between the second node and a third node; a number n of diodes that are serially coupled, wherein 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 the third node, where n is a natural number larger than or equal to 2; and a thyristor having an anode coupled to the first node, a cathode coupled to the second node, and a control terminal coupled to the third node. 2 . The semiconductor relay device according to claim 1 , further comprising a transmission circuit configured to output the input signal, wherein: the transmission circuit is a light emitting diode, and the conversion circuit includes a photodiode. 3 . The semiconductor relay device according to claim 1 , further comprising a transmission circuit configured to output the input signal, wherein: the input signal is a magnetic signal generated from a coil included in the transmission circuit, and the conversion circuit includes a coil detecting the input signal. 4 . The semiconductor relay device according to claim 1 , further comprising a transmission circuit configured to output the input signal, wherein: the transmission circuit connected to the conversion circuit via a capacitor, and the input signal is an electric signal generated from the transmission circuit and transmitted to the conversion circuit via the capacitor.
Assignees
Inventors
Classifications
- H03K17/08Primary
Modifications for protecting switching circuit against overcurrent or overvoltage · CPC title
- H03K17/08108Primary
in thyristor switches (H03K17/0812, H03K17/0814 take precedence) · CPC title
for DC voltages or currents (H03K17/722, H03K17/735 take precedence) · CPC title
Mechanical switches; Electronic switches controlling mechanical switches, e.g. relais · CPC title
against excessive temperature · CPC title
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Frequently asked questions
Answers are generated from the same data shown on this page.
- What does patent US12494781B2 cover?
- 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 …
- Who is the assignee on this patent?
- Toshiba Kk, Toshiba Electronic Devices & Storage Corp
- What technology area does this patent fall under?
- Primary CPC classification H03K17/08. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Tue Dec 09 2025 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 6 related publications on this page (citations in our corpus or others sharing the same primary CPC).