CAN bus interconnection circuit
AssigneeHill-Rom Services, Inc.
InventorMaxime E. Scolan
Life of this patent
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Abstract
A circuit for interconnecting a first controller area network (CAN) bus with a second CAN bus includes a first CAN transceiver, a second CAN transceiver, and a pair of transistors and six resistors electrically interconnecting the first and second CAN transceivers. The first CAN bus is included in a first device, such a bed to support a person or occupant, and the second CAN bus is included in a second device, such as a mattress supported by the bed. The circuit for interconnecting the first and second CAN busses is situated in an interior region of the mattress.
Claims20
A circuit for interconnecting a first controller area network (CAN) bus with a second CAN bus, the circuit comprising
- a first transmit/receive repeater,
- a second transmit/receive repeater,
- a first positive-negative-positive (PNP) transistor having a first base coupled to a first electrical line that extends between a first transmit pin of the first transmit/receive repeater and a first receive pin of the second transmit/receive repeater, the first PNP transistor further having a first collector coupled to a second electrical line that extends between a second receive pin of the first transmit/receive repeater and a second transmit pin of the second transmit receive repeater, and
- a second PNP transistor having a second base coupled to the second electrical line and a second collector coupled to the first electrical line.
Dependencies are inferred from the claim text.