Calvin Shizuo Nomura

Title: The Innovations of Calvin Shizuo Nomura

Introduction

Calvin Shizuo Nomura is a notable inventor based in San Jose, California. He has made significant contributions to the field of electronics, particularly in the area of disk drive technology. With a total of 9 patents to his name, Nomura's work has had a lasting impact on the industry.

Latest Patents

One of Nomura's latest patents is titled "Methods and apparatus for gradually decreasing supply current demand in arm electronics for write-to-read transitions." This invention focuses on arm electronics suitable for use in disk drives. The technology features write circuitry that operates in a write mode, drawing a specific supply current, and read circuitry that functions in a read mode with a different supply current. The innovation employs a decaying current pulse generator that initiates a decaying current pulse at the start of each write-to-read mode transition. This controlled load minimizes supply voltage transients, thereby reducing undesirable effects in the read circuitry and shortening write-to-read mode recovery times.

Another significant patent is the "Preamplifier bias mode to re-initialize a GMR head after losing." This invention provides a method and apparatus for re-initializing a GMR head that has lost its initialization. It utilizes a voltage-controlled waveform that allows current to vary with the resistance of the GMR head. Additionally, the invention can reinitialize a stack of GMR heads while maintaining the same orientation to prevent inversion of reset magnetic fields. Improvements in re-initializing GMR heads are achieved through wave shaping, allowing for re-initialization at various points in the manufacturing process.

Career Highlights

Throughout his career, Calvin Nomura has worked with prominent companies such as IBM and Hitachi Global Storage Technologies. His experience in these organizations has contributed to his expertise and innovative capabilities in the field of electronics.

Collaborations

Nomura has collaborated with notable individuals in the industry, including Stephen A. Jove and Klaas Berend Klaassen. These collaborations have likely enriched his work and led to further advancements in technology.

Conclusion

Calvin Shizuo Nomura's contributions to electronics, particularly in disk drive technology, showcase his innovative spirit and technical expertise. His patents reflect a commitment to improving electronic systems and enhancing performance in the industry.