Company Filing History:
Years Active: 2003-2008
Title: Fereidoon Heydari: Innovator in Hard Disk Drive Technology
Introduction
Fereidoon Heydari is a prominent inventor based in Cupertino, CA (US). He has made significant contributions to the field of hard disk drive (HDD) technology, holding a total of 3 patents. His innovative work focuses on improving the performance and efficiency of servo systems in HDDs.
Latest Patents
Heydari's latest patents include a circuit and method for demodulating a servo position burst. This new technique utilizes a 4-samples per dibit Discrete Fourier Transform (DFT) amplitude estimation to calculate the read-head servo-position error signal. Compared to the conventional burst integration method, which typically requires more than 8 samples per dibit, Heydari's approach reduces the disk space occupied by burst data while enhancing performance. Additionally, the DFT scheme does not necessitate synchronization to specific points of the servo burst and can incorporate an averaging algorithm to further improve performance based on the Signal to Noise Ratio (SNR).
Another notable patent is a servo circuit featuring a synchronous servo channel and a method for synchronously recovering servo data. This innovative system employs a synchronous Partial Response Maximum Likelihood (PRML) servo designed for high track-per-inch disk-drive systems. By shortening the servo format and increasing track density, Heydari's servo system enhances data capacity in HDDs. The system includes advanced circuits for burst demodulation, Viterbi detection, timing synchronization, and spin-up search, all contributing to a high-performance and accurate positioning of read-write heads.
Career Highlights
Fereidoon Heydari is currently employed at STMicroelectronics GmbH, where he continues to develop cutting-edge technologies in the HDD sector. His work has been instrumental in advancing the capabilities of modern storage devices.
Collaborations
Heydari has collaborated with notable colleagues, including Hakan C Ozdemir and Sadik O Arf, contributing to the innovative projects at STMicroelectronics GmbH.
Conclusion
Fereidoon Heydari's contributions to hard disk drive technology through his patents and innovative techniques have significantly impacted the industry. His work continues to pave the way for advancements in data storage solutions.