LIN bus transceiver interface driving circuit

Abstract

The invention relates to an interface driving circuit for improving driving performance of a LIN bus interface. The interface driving circuit is characterized in that two resistors are serially connected between two LIN bus transceiver; power supply terminals of the LIN bus transceiver U1 and LIN bus transceiver U2 are respectively serially connected with ten resistors together with other control terminals; the resistor R1 are serially connected between the receiving terminal of the transceiver U1 and the transmitting terminal of transceiver U2; the resistor R2 are serially connected between the transmitting terminal of the transceiver U1 and the receiving terminal of the transceiver U2; the other control terminals of the LIN bus transceiver U1 are serially connected with the resistors R3, R5, R7 and R9; a +12V power supply terminal is connected at the back of the resistor R11; the other control terminals of the LIN bus transceiver U2 are serially connected with the resistors R4, R6, R8 and R10; a +12V power supply terminal is connected at the back of the resistor R12; and the resistance ranges of the resistors R1 and R2 are of 0.1-10KOmega, and the resistance ranges of the resistors R1-R12 are of 1-500KOmega. The invention has the advantages that loading capacity of the LIN bus is improved; and a full hardware circuit is adopted to reduce signal delay without influence on the operation of current LIN bus network.

Description

technical field [0001] The invention relates to the field of bus driving, in particular to an interface driving circuit for improving the driving ability of the LIN bus interface. Background technique [0002] The so-called bus refers to the public channel for information transmission within and between computers, measuring instruments, and automatic test systems, and is an important part of the system. The use of bus technology can greatly simplify the system structure, increase the compatibility, openness, reliability and maintainability of the system, facilitate the implementation of standardization and organize large-scale production, and thus significantly reduce the system cost. There are many types of buses, and there are various classification methods. They can be divided into chip bus, on-board bus, chassis bus, device interconnection bus, field bus and network bus only according to the application occasion. Different application occasions need to choose the approp...

AI Technical Summary

Problems solved by technology

[0004] In a LIN bus network, due to the limitation of the communication distance of 40m and the bus load capacity, LIN bus repeaters are usually used to improve the driving capability and extend the communication distance. The existing technical solutions mostly use one microprocessor and two LIN Bus transceiver implementation, that is, the message on the LIN bus must be processed by the LIN bus transceiver and microprocessor software before sending, which is prone to delay and reduces reliability

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