Edward R Darrah

Title: Edward R. Darrah: Innovator in Servo Systems

Introduction

Edward R. Darrah is a notable inventor based in San Jose, California. He is recognized for his contributions to the field of servo systems, particularly in the area of data path positioning. His innovative approach has led to advancements in how transducers interact with recording media.

Latest Patents

Darrah holds a patent for a "Sectorized data path following servo system." This invention focuses on accurately positioning a transducer relative to data paths on a recording medium. The system detects sync and servo signals from two parallel abutting servo tracks that share a common longitudinal boundary within circumferentially spaced sectors of the medium. The technology utilizes two servo waveforms of different frequencies, which are preceded by a sync reference waveform. This reference is crucial for a phase-locked oscillator connected to the transducer, generating modulation signals that mix with transducer signals from both servo waveforms. The system derives an imbalance error signal that helps center the transducer on the data path.

Career Highlights

Edward R. Darrah has made significant strides in his career, particularly through his work at Sperry Rand Corporation. His innovative designs and patents have contributed to the advancement of servo technology, enhancing the accuracy and efficiency of data retrieval systems.

Collaborations

Throughout his career, Darrah has collaborated with notable colleagues, including Frank J. Sordello and James Joseph Touchton. These partnerships have fostered a creative environment that has led to groundbreaking innovations in the field.

Conclusion

Edward R. Darrah's contributions to servo systems exemplify the impact of innovation in technology. His patent and work at Sperry Rand Corporation highlight his role as a key figure in advancing data path positioning systems.