Self-Correcting Differential Circuit for Asymmetric Crosstalk
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Solution Overview
Problem
High-speed serial signals experience asymmetric crosstalk interference during transmission, leading to error characters and reduced transmission efficiency due to differential logical operations failing to eliminate crosstalk on P and N signals.
Innovation Solution
A self-correcting circuit with a calculation unit and correcting unit that calculates and corrects the voltage difference between P and N signals, using transistors and operational amplifiers to ensure symmetrical interference signals, allowing reliable signal transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If differential logical operation is performed on P and N signals, then crosstalk elimination is achieved, but asymmetric crosstalk causes error characters and reduces transmission reliability
Solution Approach 1:
The patent applies asymmetry by detecting the voltage difference between P and N signals and selectively correcting only the N signal when asymmetric crosstalk is detected. The correcting unit adjusts the N signal based on the detected voltage difference, creating an asymmetric correction approach that targets the specific signal affected by asymmetric crosstalk, thereby eliminating error characters while maintaining transmission reliability
Solution Approach 2:
The patent implements feedback through the detection unit that continuously monitors the voltage difference between P and N signals. When asymmetric crosstalk is detected (voltage difference exceeds threshold), the system feeds back correction information to the correcting unit, which then adjusts the N signal accordingly. This closed-loop feedback mechanism ensures reliable signal transmission by dynamically responding to asymmetric crosstalk conditions
2Reliability
If error character bits are detected and discarded, then transmission errors are handled, but transmission efficiency decreases due to retransmission requirements
Solution Approach 1:
The patent applies preliminary action by proactively correcting the N signal before transmission errors occur. The detection unit monitors voltage differences in real-time, and when asymmetric crosstalk is detected, the correcting unit pre-corrects the N signal based on the detected difference. This preliminary correction prevents error character generation, eliminating the need for error detection, discarding, and retransmission, thereby maintaining high transmission efficiency while ensuring reliability
Solution Approach 2:
The patent converts the harmful effect of asymmetric crosstalk into a beneficial correction mechanism. By detecting the voltage difference caused by asymmetric crosstalk, the system uses this information to generate a correction signal that compensates for the interference. The harmful voltage difference becomes the basis for the correction amount, transforming the problem into a solution that maintains both reliability and transmission efficiency
3Stability of the object's composition
If P and N signals follow close paths, then signal integrity is maintained, but asymmetric crosstalk from surrounding environment cannot be avoided
Solution Approach 1:
The patent applies self-service by using the voltage difference information inherent in the asymmetric crosstalk to generate its own correction signal. The detection unit measures the voltage difference between P and N signals, and this measured difference directly determines the correction amount applied to the N signal. The system serves itself by using its own detection capability to generate the correction, eliminating dependency on external shielding or complex path design while maintaining signal integrity
Data Source
AI summary
The present application relates to a technical field of signal transmission, in particular, to a self-correcting circuit and a signal self-correcting method. The circuit includes a calculation unit, a correcting unit, and a first transistor; an output end of the calculation unit is connected to an input end of the correcting unit; an output end of the correcting unit is connected to the first transistor; the calculation unit is configured to calculate a voltage difference between a P signal and an N signal; and the correcting unit is configured to correct, according to the voltage difference, an interference signal corresponding to the N signal, control the first transistor to be turned on, and output the corrected N signal through the first transistor.