Lou Shrinkle

Title: Lou Shrinkle: Inventor in Magnetic-Head Testing

Introduction

Lou Shrinkle is an inventor associated with Leucadia, California, and Headway Technologies, Incorporated. Her work includes inventions for testing magnetic-head and media components and improving the accuracy of hard-disk drive positioning. She is credited with 3 patents.

Latest Patents

**Low Cost Simplified Spectrum Analyzer for Magnetic Head/Media Tester.** This invention describes an electronic component tester that evaluates magnetic-head and media components using performance measures such as signal-to-noise ratio and overwrite. A tester process controller supplies calibration and control signals, while a spectrum analyzer receives a response signal from the component under test and determines its frequency spectrum. The analyzer also uses the controller’s signals to account for image-frequency effects and determine the spectrum’s noise bandwidth.

**Iterative Repeatable Run-Out Nulling for Magnetic Head Tester.** This invention presents a method for reducing repeatable errors when a hard disk with pre-written servo tracks is moved from one machine to another. It iteratively measures position-error signals and forms new track profiles, called IRON profiles, that are effectively circular. By tracking these profiles, a head-testing apparatus or host drive can reduce repeatable run-out and associated positioning errors.

Career Highlights

Shrinkle’s listed patent work focuses on magnetic storage technology, particularly component testing, signal analysis, and servo-track positioning. These inventions address practical challenges in evaluating magnetic recording components and maintaining accurate head positioning.

Collaborations

Shrinkle is associated with Headway Technologies, Incorporated. Her listed coworkers include David Hu and Peter Crill.

Conclusion

Lou Shrinkle’s patent work reflects contributions to magnetic-head testing and hard-disk positioning, with inventions aimed at improving measurement and reducing repeatable tracking errors.