Fredrick Harrison Fischer

Title: Fredrick Harrison Fischer: Innovator in Adaptive Bus Arbitration

Introduction

Fredrick Harrison Fischer is a notable inventor based in Macungie, PA (US). He has made significant contributions to the field of technology, particularly in the area of bus arbitration systems. His innovative approach has led to the development of a unique patent that enhances the efficiency of system buses.

Latest Patents

Fischer holds a patent for "Adaptive bus arbitration using history buffer." This invention provides a method and apparatus that allows two independent arbiters, which do not directly communicate, to operate on a common system bus. This capability enables efficient operation of a master controller and allows for virtually endless addition of peripherals to the common system bus without the complications typically associated with additional arbitration overhead. The master controller can set time slot parameters for an external subordinate arbiter as frequently as needed. The subordinate arbiter operates on a separate portion of the common system bus, except during designated time slots for communication with the super arbiter. This innovative design includes a tri-state buffer element that facilitates communication between different sections of the bus. In adaptive arbitration mode, the subordinate arbiter utilizes both static time slot information and actual bus requests to generate grant signals for requesting devices. It can also reassign time slots that are not in use, optimizing the overall system performance. A historical buffer can be maintained for time slots, allowing for the generation of long-term statistical information, which can be used to re-tune time slot configurations based on past usage.

Career Highlights

Fischer is currently employed at Agere Systems Inc., where he continues to contribute to advancements in technology. His work has been instrumental in developing systems that improve the functionality and efficiency of electronic devices.

Collaborations

Fischer has collaborated with Scott A. Segan, working together to enhance the capabilities of their projects and drive innovation within their field.

Conclusion

Fredrick Harrison Fischer's contributions to adaptive bus arbitration demonstrate his commitment to innovation and efficiency in technology. His patent reflects a deep understanding of system operations and a forward-thinking approach to problem-solving.