David Hanrahan

Title: David Hanrahan: Innovator in Fan Speed Control and Address Selection Technology

Introduction

David Hanrahan is a notable inventor based in Waterford, Ireland. He has made significant contributions to the field of electronics, particularly in the areas of fan speed control and address selection systems. With a total of 2 patents to his name, Hanrahan continues to push the boundaries of innovation.

Latest Patents

Hanrahan's latest patents include a "Method and apparatus for determining fan speed" and an "Address selection circuitry and method using a single analog input line." The first patent focuses on an operating circuit designed to control the speed of a cooling fan motor for computer cabinetry. This invention includes a control circuit that manages a variable output signal generator, which outputs a pulse width modulated signal to regulate the fan motor's speed. The system also features a monitoring resistor, capacitor, and a tachometer signal to ensure optimal fan performance.

The second patent addresses a system for providing addresses to multiple addressable integrated circuits. This innovative approach utilizes a plurality of address select circuits, each connected to a corresponding integrated circuit. The system is designed to convert selected signal levels into address signals, facilitating efficient communication between the circuits during both initial address selection and normal operating modes.

Career Highlights

David Hanrahan is currently employed at Analog Devices, Inc., where he applies his expertise in electronics to develop cutting-edge technologies. His work has significantly impacted the efficiency and functionality of electronic devices, particularly in the realm of cooling systems and integrated circuit communication.

Collaborations

Throughout his career, Hanrahan has collaborated with talented individuals such as John Blake and Kohji Yoshida. These partnerships have fostered a creative environment that encourages innovation and the development of groundbreaking technologies.

Conclusion

David Hanrahan is a distinguished inventor whose work in fan speed control and address selection technology has made a lasting impact on the electronics industry. His contributions continue to inspire future innovations in the field.