Skew Tolerant Multi-Head Data Processing via Joint Equalization
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Solution Overview
Problem
Existing data processing systems for multiple read heads in storage media face challenges with skew angles, requiring tight tolerances and increasing production costs due to the need for precise alignment to ensure accurate data sensing from the same track.
Innovation Solution
The implementation of a data processing system comprising a buffer circuit, a selector circuit, and a joint equalizer circuit that stores and selects digital samples from multiple read heads, applying a joint equalization algorithm to handle skew angles and ensure accurate data processing across different tracks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If three or more read heads are used with tight location tolerances to ensure two heads sense data from the same track, then data sensing accuracy is improved, but production costs increase
Solution Approach 1:
The patent changes the parameter of read head spacing from fixed tight tolerances to variable spacing that accommodates skew angles. By allowing the radial position to vary and compensating through signal processing (buffering and selection), the system achieves accurate data sensing without requiring expensive tight mechanical tolerances in head assembly production
Solution Approach 2:
The patent replaces the mechanical solution (tight mechanical alignment of read heads) with an electronic/signal processing solution. Instead of mechanically ensuring precise head positioning, the system uses digital buffering, selection logic, and signal combining to achieve the same goal of accurate data sensing from the same track
2Adaptability or versatility
If read heads are positioned to accommodate skew angles at outer and inner diameters, then adaptability to different track locations is improved, but manufacturing precision requirements increase
Solution Approach 1:
The patent introduces dynamic adaptation to skew angles through signal processing. The system dynamically selects which read head data to use based on the detected skew condition and radial position, rather than relying on fixed mechanical positioning. This dynamic selection and buffering approach allows the system to adapt to varying skew angles without requiring precise static mechanical alignment
Solution Approach 2:
The patent makes the read head assembly universal across different radial positions by implementing a selection mechanism that can handle data from multiple heads regardless of which track they are sensing. The system becomes multi-functional, capable of processing data from different radial locations (inner diameter, outer diameter, middle regions) with varying skew angles using the same hardware configuration
Data Source
AI summary
Systems, methods, devices, circuits for data processing, and more particularly to systems and methods for processing skew tolerant processing of data derived from multiple read heads.