Detection circuit, detection method and chip

Abstract

The invention relates to a detection circuit, a detection method and a chip. The detection circuit comprises two transmit-receive circuits, differential ports between the two transmit-receive circuits are connected with each other, each transmit-receive circuit comprises a transmitting circuit, an echo cancellation circuit, a switching circuit and a receiving circuit, a first output end of the transmitting circuit and a first input end of the echo cancellation circuit form a first path, and a second output end of the transmitting circuit and a second input end of the echo cancellation circuit form a second path; the second output end of the transmitting circuit, the switching circuit and the second input end of the echo cancellation circuit form a second path, and the receiving circuit is used for determining whether the differential port is abnormal or not according to the output signal of the echo cancellation circuit when the switching circuit conducts the second path. The detection circuit can realize differential port state detection without adding an additional analog circuit, and whether the differential port is abnormal can be determined only by controlling the working state of the echo cancellation circuit through the switching circuit, so that the scale of the detection circuit can be reduced on the basis of ensuring the differential port state detection function.

Description

technical field [0001] The present application relates to the field of network technology, in particular to a detection circuit, a detection method and a chip. Background technique [0002] Since there are more and more electronic devices inside the car, the challenge to the bandwidth is getting higher and higher. The use of vehicle Ethernet technology can satisfy the calculation and communication of different devices in the car. In order to ensure that the calculation and communication process remains smooth, it is necessary to detect the interface status of the vehicle Ethernet in real time, so as to solve the problem of interface connection failure in time according to the detection results, so that the interface of the vehicle Ethernet can maintain a normal connection state. [0003] In the traditional technology, an analog detection circuit is added to the Ethernet physical layer interface circuit to detect the interface state of the vehicle Ethernet in real time. Howe...

AI Technical Summary

Problems solved by technology

However, using the traditional way to detect the interface state will increase the scale of the circuit

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