Donald E Charles

Title: Innovations of Donald E Charles

Introduction

Donald E Charles is an accomplished inventor based in Lake Zurich, IL (US). He holds a total of 3 patents that showcase his contributions to technology and innovation. His work primarily focuses on advancements in dosimetry and battery charging systems.

Latest Patents

One of his latest patents is a dosimeter for photometric applications. This invention provides a temperature-independent dosimeter designed to measure the amount of irradiation at a predetermined frequency. A photodiode operates in its photovoltaic mode, producing a signal that is amplitude-proportional to the irradiation. This signal is then converted by operational amplifiers into a series of pulses that are counted by a counter, terminating the irradiation once a predetermined count is reached.

Another significant patent is a constant current battery charging circuit. This circuit ensures that the battery receives a full charge until its voltage reaches a specific threshold. Once the voltage exceeds this threshold, the battery receives a trickle charge. The system includes a comparison of the actual battery voltage with a reference voltage to determine the operation of the full charge circuit. Additionally, it features hysteresis to prevent rapid on/off cycling around the threshold, with independent temperature compensation.

Career Highlights

Donald E Charles is associated with Baxter Travenol Laboratories, Inc., where he has made significant contributions to the field of technology. His innovative work has led to advancements that benefit various applications in the industry.

Collaborations

He has collaborated with Michael F Wicnienski, further enhancing the innovative efforts within their field.

Conclusion

Donald E Charles is a notable inventor whose work in dosimetry and battery technology has led to valuable patents. His contributions continue to impact the industry positively.