IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0281254
(2002-10-28)
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발명자
/ 주소 |
- Gottshall,Paul
- Armstrong,Mike
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출원인 / 주소 |
|
대리인 / 주소 |
Finnegan,Henderson, Farabow, Garrett&
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인용정보 |
피인용 횟수 :
2 인용 특허 :
29 |
초록
▼
A controller area network (CAN) data link is provided including a first node, a second node, and a transformer circuit connected between the first and second nodes to provide electrical isolation. The transformer circuit provides the requisite electrical isolation and is reliable under high temperat
A controller area network (CAN) data link is provided including a first node, a second node, and a transformer circuit connected between the first and second nodes to provide electrical isolation. The transformer circuit provides the requisite electrical isolation and is reliable under high temperatures.
대표청구항
▼
What is claimed is: 1. A controller area network (CAN) data link, comprising: means for sending and receiving CAN messages; controller means for controlling CAN messages; and a circuit comprising: a transformer for providing electrical isolation; a first transistor coupled to a first R-C circuit an
What is claimed is: 1. A controller area network (CAN) data link, comprising: means for sending and receiving CAN messages; controller means for controlling CAN messages; and a circuit comprising: a transformer for providing electrical isolation; a first transistor coupled to a first R-C circuit and a second R-C circuit and coupled between the transformer and the controller means; and a second transistor coupled between the transformer and the sending and receiving means. 2. The CAN data link of claim 1, wherein the first R-C circuit is coupled between the first transistor and the controller means and the second R-C circuit is coupled between the first transistor and the transformer. 3. A controller area network (CAN) data link, comprising: means for sending and receiving CAN messages; controller means for controlling CAN messages; and a circuit comprising: transformer means for providing electrical isolation; a first transistor coupled to a first R-C circuit and a second R-C circuit and coupled between the transformer means and the controller means, wherein the first R-C circuit is coupled between the first transistor and the controller means and the second R-C circuit is coupled between the first transistor and the transformer means; a second transistor coupled between the transformer means and the sending and receiving means; and a diode coupled to the second R-C circuit and a voltage supply. 4. A controller area network (CAN) data link, comprising: means for sending and receiving CAN messages; controller means for controlling CAN messages; and a circuit comprising: transformer means for providing electrical isolation; a first transistor coupled to a first R-C circuit and a second R-C circuit and coupled between the transformer means and the controller means, wherein the first R-C circuit is coupled between the first transistor and the controller means and the second R-C circuit is coupled between the first transistor and the transformer means; and a second transistor coupled between the transformer means and the sending and receiving means, wherein an emitter of the first transistor is coupled with a ground, an emitter of the second transistor is coupled with a ground, and a side of the transformer means is coupled with a ground. 5. A controller area network (CAN) data link, comprising: a first node; a second node; and a transformer circuit coupled between the first and second nodes to provide electrical isolation, wherein the transformer circuit includes: a first R-C circuit having a first and a second end, wherein the first end is coupled with the first node; a first transistor, wherein the second end of the first R-C circuit is coupled with a first node of the first transistor and a second node of the first transistor is coupled with ground; a second R-C circuit having a first and a second end, wherein the first end of the second R-C circuit is coupled with a third node of the first transistor; a diode having a first and a second end, wherein the first end of the diode is coupled with the first end of the second R-C circuit and the second end of the diode is coupled with a voltage supply; a transformer having a first side and a second side, wherein a first end of the first side is coupled with the second end of the diode, a second end of the first side is coupled with the second end of the second R-C circuit, and a first end of the second side is coupled with ground; and a second transistor, wherein a first node of the second transistor is coupled with a second end of the second side of the transformer, a second node of the second transistor is coupled with ground, and a third node of the second transistor is coupled with the second node. 6. The CAN data link of claim 5, wherein the first node includes a CAN controller. 7. The CAN data link of claim 5, wherein the second node includes a transceiver. 8. The CAN data link of claim 7, wherein the second node further includes an isolated voltage supply. 9. A controller area network (CAN) data link, comprising: a first node; a second node; and a transformer circuit coupled between the first and second nodes to provide electrical isolation, wherein the transformer circuit includes: a first R-C circuit having a first and a second end, wherein the first end is coupled with the first node; a first transistor, wherein the second end of the first R-C circuit is coupled with a base of the first transistor and an emitter of the first transistor is coupled with ground; a second R-C circuit having a first and a second end, wherein the first end of the second R-C circuit is coupled with a collector of the first transistor; a diode having a first and a second end, wherein the first end of the diode is coupled with the first end of the second R-C circuit and the second end of the diode is coupled with a voltage supply; a transformer having a first side and a second side, wherein a first end of the first side is coupled with the second end of the diode, a second end of the first side is coupled with the second end of the second R-C circuit, and a first end of the second side is coupled with ground; and a second transistor, wherein a base of the second transistor is coupled with a second end of the second side of the transformer, an emitter of the second transistor is coupled with ground, and a collector of the second transistor is coupled with the second node. 10. The CAN data link of claim 9, wherein the first node includes a CAN controller. 11. The CAN data link of claim 9, wherein the second node includes a transceiver. 12. The CAN data link of claim 11, wherein the second node further includes an isolated voltage supply. 13. A method for providing electrical isolation in a controller area network, the method comprising: providing a first and a second node; providing a transformer circuit; connecting a first end of the transformer circuit to the first node; and connecting a second end of the transformer circuit to the second node, wherein the step of providing a transformer circuit includes: providing a first R-C circuit having a first and a second end, wherein the first end is coupled with the first node; providing a first transistor, wherein the second end of the first R-C circuit is coupled with a base of the first transistor and an emitter of the first transistor is coupled with ground; providing a second R-C circuit having a first and a second end, wherein the first end of the second R-C circuit is coupled with a collector of the first transistor; providing a diode having a first and a second end, wherein the first end of the diode is coupled with the first end of the second R-C circuit and the second end of the diode is coupled with a voltage supply; providing a transformer having a first side and a second side, wherein a first end of the first side is coupled with the second end of the diode, a second end of the first side is coupled with the second end of the second R-C circuit, and a first end of the second side is coupled with ground; and providing a second transistor, wherein a base of the second transistor is coupled with a second end of the second side of the transformer, a emitter of the second transistor is coupled with ground, and a collector of the second transistor is coupled with the second node. 14. The method of claim 13, wherein the step of providing a first and second node includes providing a CAN controller for handling incoming and outgoing CAN messages. 15. The method of claim 14, wherein the step of providing a first and second node further includes providing an isolated voltage supply. 16. The method of claim 13, wherein the step of providing a first and second node includes providing a transceiver.
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