Two-Tier Sampling Phase Correction for Precise Data Transfer
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Solution Overview
Problem
Current sampling correction frequency circuits in data transfer systems face challenges in achieving sufficient accuracy, especially in low signal-to-noise ratio environments, which affects the accuracy of data transfer in high-density data patterns.
Innovation Solution
A two-tier sampling phase adjustment circuit that includes an analog to digital converter with coarse phase adjustment and a digital interpolation circuit with fine phase adjustment, utilizing a phase error circuit and phase adjustment control circuit to determine and adjust both coarse and fine control signals, and employing a latency adjustment circuit to compensate for latency differences between the adjustments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a single-tier sampling correction circuit is used, then the device complexity is reduced, but the measurement precision of sampling phase is insufficient
Solution Approach 1:
The sampling phase correction is divided into two independent tiers: a first sampling phase correction circuit that performs coarse correction, and a second sampling phase correction circuit that performs fine correction. This segmentation allows each circuit to specialize in a specific correction range, improving overall precision without requiring a single overly complex circuit to handle all correction needs.
Solution Approach 2:
The invention introduces a hierarchical dimension to the correction process by operating at two distinct correction levels. The first correction circuit handles large-phase deviations while the second correction circuit handles fine-tuning, effectively adding a dimensional layer to the correction architecture that resolves the precision-complexity tradeoff.
2Manufacturing precision
If the interpolation range is reduced, then the manufacturing precision of the digital interpolation circuit is improved, but the adaptability to different sampling phases is reduced
Solution Approach 1:
The sampling phase correction range is segmented between two circuits: the first correction circuit handles coarse adjustments covering a wide phase range, while the second correction circuit handles fine adjustments within a limited range. This segmentation allows the digital interpolation circuit to operate with high precision over a small range while the system as a whole maintains broad adaptability through the first correction circuit.
3Productivity
If the sampling frequency is updated more frequently, then the productivity of data transfer is improved, but the loss of time for processing corrections increases
Solution Approach 1:
The correction processing is segmented into two parallel paths that operate simultaneously: the first correction circuit processes coarse adjustments while the second correction circuit processes fine adjustments. This segmentation allows continuous correction without sequential delays, maintaining high data transfer rates while minimizing total correction time through concurrent processing.
Data Source
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AI summary
Various embodiments of the present invention provide systems and methods for data processing. For example, a data processing circuit is disclosed that includes an analog to digital converter, a digital interpolation circuit, a phase error circuit, and a phase adjustment control circuit. The analog to digital converter samples an analog data input at a sampling phase governed at least in part by a coarse control, and provides a series of digital samples. The digital interpolation circuit interpolates between a subset of the series of digital samples based at least in part on a fine control. The phase error circuit calculates a phase error value. The phase adjustment control circuit is operable to determine the coarse control and the fine control based at least in part on the phase error value.