Serial Data Offset Calibration via Token-Based Detection
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Solution Overview
Problem
In serial communication interfaces, data transmitted can suffer from propagation delay and signal reflection, leading to data offset issues that result in incorrect data reception at the receiver end.
Innovation Solution
A serial data processing device equipped with an offset detector circuit and an offset calibration circuit that uses tokens with varying logic values to detect and calibrate data offsets, generating a calibration signal to correct the received data signal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If tokens with varying numbers of predetermined logic values are used for offset detection, then offset detection precision is improved, but device complexity increases
Solution Approach 1:
The patent segments the offset detection process into multiple stages by using tokens with different numbers of predetermined logic values. Each token pattern represents a specific offset condition, allowing the system to systematically detect and identify offset values through sequential comparison rather than requiring a single complex detection mechanism.
Solution Approach 2:
The patent introduces tokens as intermediary elements between the data transmission system and the offset detection mechanism. These tokens serve as mediators that encode offset information through their logic value patterns, enabling indirect detection of offset conditions without directly measuring the offset itself.
2Reliability
If offset calibration is performed using multiple tokens with different logic values, then data transmission reliability is improved, but processing time increases
Solution Approach 1:
The patent performs offset detection and calibration using predetermined tokens before actual data transmission begins. By pre-establishing the correct offset through token-based calibration, the system ensures that subsequent data transmission can proceed with correct timing without requiring continuous offset adjustment during data transfer.
Solution Approach 2:
The patent implements a feedback mechanism where the receiver compares received token patterns against expected patterns to detect offset conditions. The offset calibration circuit uses this feedback information to adjust the sampling timing, creating a closed-loop system that continuously refines offset compensation based on actual reception quality.
Data Source
AI summary
A serial data processing device includes an offset detector circuit and an offset calibration circuit. The offset detector circuit is configured to store a plurality of tokens, and to receive a first data signal from a host device, and to detect an offset in the received first data signal according to the plurality of tokens, in order to generate a calibration signal, in which each of the tokens includes at least one predetermined logic value, and numbers of the at least one predetermined logic value in each of the plurality of tokens are different. The offset calibration circuit is configured to calibrate the received first data signal according to the calibration signal, in order to generate a second data signal.