Pham D Tam

Title: Pham D Tam: Innovator in Magnetic Disk Memory Technology

Introduction

Pham D Tam is a notable inventor based in Bagneux, France. She has made significant contributions to the field of magnetic disk memory technology. Her innovative approach has led to the development of a unique method and apparatus for displacing a movable system driven by a magnetic disk memory.

Latest Patents

Pham D Tam holds a patent for a method of and apparatus for displacing a movable system driven by a magnetic disk memory. This invention involves moving the magnetic disk memory between a first position beyond the disk periphery and a second position proximate the disk periphery while the head is at an idle height above the disk face. The head is then moved between the disk periphery and a third position at the edge of an area on the disk where data are located. The assembly carrying the head includes a radially extending arm, turned by a rotary DC motor. A continuous step excitation waveform is supplied to the motor as the head is driven between the first and second positions until it arrives at one of the two positions. Each of the steps has a constant amplitude that differs from the immediately preceding step by a predetermined incremental value. The last step has a time duration no greater than that of the previous steps and is determined by when the head arrives at the one position. To drive the head between the second and third positions, a damping impulse having a predetermined constant amplitude and duration is applied to the motor to cause it to stop without overshoot and to be driven to a predetermined speed by applying a decreasing ramp excitation waveform.

Career Highlights

Pham D Tam is currently employed at Cii Honeywell Bull, where she continues to innovate in her field. Her work has been instrumental in advancing magnetic disk memory technology, showcasing her expertise and dedication to her craft.

Collaborations

Throughout her career, Pham D Tam has collaborated with notable colleagues, including Daniel Carteau and Jean-Jacques Couette. These collaborations have further enriched her work and contributed to the success of her inventions.

Conclusion

Pham D Tam is a pioneering inventor whose contributions to magnetic disk memory technology have made a lasting impact. Her innovative methods and dedication to her work continue to inspire advancements in the field.