John E Donohue

Title: John E Donohue: Innovator in Telecommunications

Introduction

John E Donohue is a notable inventor based in Ridgefield, CT (US). He has made significant contributions to the field of telecommunications, holding a total of 5 patents. His work focuses on enhancing communication systems through innovative technologies.

Latest Patents

One of his latest patents is for a digital node for hybrid fiber/coax networks. This optical distribution node includes a laser transceiver that connects to fiber optic links, enabling upstream and downstream digital data communication with the head end. The design incorporates a data concentrator and features such as a frequency translator and a node modem, which facilitate efficient data transmission and collision detection over coaxial cable links.

Another significant patent involves systems and methods for holdover circuits in phase locked loops. This invention addresses momentary breaks in input communication channels by allowing the output clock to maintain a frequency close to the last output before data loss. The improved phase locked loops utilize a differential phase detector, an electronic selector circuit, and an operational amplifier-based loop filter circuit to ensure stable output frequencies.

Career Highlights

John E Donohue is currently employed at ADC Telecommunications, Inc., where he continues to develop innovative solutions in telecommunications. His expertise in the field has led to advancements that enhance communication reliability and efficiency.

Collaborations

Throughout his career, Donohue has collaborated with talented individuals such as Aravanan Gurusami and Clarke V Greene. These partnerships have contributed to the successful development of his patented technologies.

Conclusion

John E Donohue's contributions to telecommunications through his patents demonstrate his commitment to innovation and improvement in communication systems. His work continues to influence the industry and pave the way for future advancements.