Darrel D Donaldson

Title: The Innovations of Darrel D. Donaldson

Introduction

Darrel D. Donaldson is an accomplished inventor based in Kettering, Ohio. He has made significant contributions to the field of electronics, particularly in the development of high voltage circuits and memory storage solutions. With a total of 2 patents to his name, Donaldson's work showcases his expertise and innovative spirit.

Latest Patents

Donaldson's latest patents include a high voltage pass circuit and a static volatile/non-volatile RAM cell. The high voltage pass circuit is designed to efficiently pass high voltage signals while blocking unwanted signals when disabled. This circuit is particularly useful for coupling write and erase voltages to nonvolatile memory arrays integrated on a common chip. It features a two-phase pump that draws transient current from the high voltage input line, raising the voltage level on an internal capacitive node through unidirectional charge transfers. This elevated voltage provides a driving signal that allows high voltage to be passed to an output line without incurring threshold voltage losses.

The static volatile/non-volatile RAM cell employs a bistable multivibrator with non-volatile, alterable-threshold capacitors for backup data storage during power-down situations. This innovative design includes non-volatile capacitors with both non-alterable and alterable sections, utilizing field effect transistors to couple these capacitors to the output terminals. The coupling transistors are biased to produce a bootstrapped voltage on one of the nodes, effectively isolating it from the output terminals of the cell.

Career Highlights

Darrel D. Donaldson is currently associated with NCR Corporation, where he continues to push the boundaries of electronic innovation. His work has had a lasting impact on the industry, particularly in the areas of memory technology and high voltage applications.

Collaborations

Throughout his career, Donaldson has collaborated with notable colleagues, including Donald G. Craycraft and George C. Lockwood. These partnerships have fostered a creative environment that has led to groundbreaking advancements in their respective fields.

Conclusion

Darrel D. Donaldson's contributions to electronics through his innovative patents highlight his role as a leading inventor in the industry. His work continues to influence the development of advanced electronic circuits and memory solutions.