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ISO1050: 芯片的应用问题

Part Number: ISO1050

左边这路CAN是上面的原理图的方案,R13去掉了。右边CAN是另外一个方案的

两路CAN并联,匹配一个120欧姆电阻,波形是过载。没有电阻直接是异常的错误波形

请帮忙看看原理图是否正确以及异常波形可能是什么问题  应该怎么解决