Serial differential non-return-to-zero code identification method

Abstract

The invention relates to a serial differential non-return-to-zero code identification method. Based on the logic or non-operation results of two paths of differential signals corresponding to the serial differential non-return-to-zero code, a brand new identification method is designed, each falling edge position of the result is used as each starting mark position; combining with the preset n times of the serial differential non-return-to-zero code frequency and taking as a clock frequency, the two paths of differential signals are sampled respectively, then the data value corresponding to the serial differential non-return-to-zero code is obtained through decoding, and therefore by means of sampling judgment and storage of the digital circuit, identification of the serial differential non-return-to-zero code can be achieved, and control logic is simple and effective; the whole identification method is stable, reliable and small in error, code values can be correctly identified and correct data can be output only by simple falling edge judgment for each starting sign position for sampling, and the method has the characteristics of stable and reliable performance and small identification error.

Description

technical field [0001] The invention relates to a serial differential non-return-to-zero code recognition method, which belongs to the technical field of serial code recognition. Background technique [0002] The serial differential non-return-to-zero code is widely used in civil and commercial fields all over the world, and the signal of this system is the most widely used serial code. The traditional serial differential non-return-to-zero The recognition process often brings large errors, and the control is more cumbersome. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a serial differential non-return-to-zero code recognition method, which can realize high-accuracy serial differential non-return-to-zero code recognition between external equipment and an application system. [0004] The present invention adopts the following technical solutions in order to solve the above-mentioned technical problems: the pre...

AI Technical Summary

Problems solved by technology

[0002] The serial differential non-return-to-zero code is widely used in civil and commercial fields all over the world, and the signal of this system is the most widely used serial code. The traditional serial differential non-return-to-zero The processing of recognition often brings large errors, and the control is more cumbersome

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