Wei-Min Lu

Title: Innovations of Wei-Min Lu in Digital Signal Processing

Introduction

Wei-Min Lu is a notable inventor based in San Jose, California. He has made significant contributions to the field of digital signal processing, particularly in the area of hard disk drive servo control systems. His work focuses on reducing track misregistration caused by digital-to-analog converter quantization noise.

Latest Patents

Wei-Min Lu holds a patent titled "Method and apparatus for reducing track misregistration due to digital-to-analog converter quantization noise." This invention addresses the issue of quantization noises, or roundoff errors, that arise from the finite precision of the digital-to-analog converter (DAC) in hard disk drives. The patent introduces a quantization error feedback (QEF) technique that reshapes the noise spectrum to minimize its impact on track misregistration. The QEF technique involves monitoring and accumulating quantization errors in a digital signal processor (DSP) and modifying the most significant bits (MSB) fed to the DAC to counteract the error.

Career Highlights

Wei-Min Lu has had a distinguished career, working at International Business Machines Corporation (IBM). His expertise in digital signal processing has led to advancements in hard disk drive technology, enhancing the performance and reliability of these systems.

Collaborations

Throughout his career, Wei-Min Lu has collaborated with esteemed colleagues, including Roger William Wood and Mantle Man-Hon Yu. These collaborations have contributed to the development of innovative solutions in the field of digital signal processing.

Conclusion

Wei-Min Lu's contributions to the field of digital signal processing, particularly through his patented innovations, have significantly advanced the technology used in hard disk drives. His work continues to influence the industry and improve the performance of data storage systems.