Sampling circuit, method for using sampling circuit, storage medium, and electronic device

A sampling circuit, comprising:

• a generator, connected to a link loopback pulse signal transmission module and configured to generate a first loopback pulse signal;
• a loopback selection module, connected to the link loopback pulse signal transmission module and configured to establish a plurality of loopback links according to a pre-configured connection combination;
• the link loopback pulse signal transmission module, configured to receive the first loopback pulse signal sent by the generator, and transmit the first loopback pulse signal in the plurality of loopback links that have been established, wherein the first loopback pulse signal and first link data are transmitted synchronously in the plurality of loopback links;
• a loopback sampling module, connected to the link loopback pulse signal transmission module and configured to determine, from the plurality of loopback links, a target loopback link on which sampling is to be performed, and sample a first link data that is on the target loopback link and passes through a target sampling point, so as to obtain second link data;
• and
• a sampling storage module, connected to the loopback sampling module and configured to store sampling data in a random access memory, wherein the sampling data comprises:
• the second link data and the first loopback pulse signal.