Graham J Fletcher

Title: Graham J Fletcher: Innovator in Clock Recovery Technology

Introduction

Graham J Fletcher is a notable inventor based in Wiltshire, GB. He has made significant contributions to the field of data transmission technology, particularly in clock recovery systems. With a total of 2 patents to his name, Fletcher's work has had a considerable impact on the efficiency of data communication.

Latest Patents

Fletcher's latest patents include a "Broad band VCO control system for clock recovery" and a "Clock driven data sampling circuit." The first patent addresses a receiver circuit designed for data in NRZ1 coding transmitted at high data rates along optical fiber links. This invention incorporates a clock circuit that utilizes a phase locked loop with a voltage-controlled oscillator to generate a clock signal that is synchronized with the incoming data signal. The system includes a phase detector and a phase frequency detector to ensure accurate clock recovery, thereby overcoming phase jitter issues.

The second patent, the "Clock driven data sampling circuit," focuses on recovering clock information from incoming data signals, also preferably in NRZ1 form. This circuit employs a voltage-controlled oscillator that provides a clock signal to multiple integrate/hold circuits. These circuits work together to adjust the phase of the clock signal to match that of the incoming data signal, ensuring precise data sampling and integration.

Career Highlights

Graham J Fletcher is currently associated with Plessey Overseas Limited, where he continues to innovate in the field of data communication technologies. His work has been instrumental in advancing the capabilities of optical fiber data transmission systems.

Collaborations

Fletcher has collaborated with notable professionals in his field, including his coworker Peter G Laws. Their combined expertise has contributed to the development of advanced technologies in clock recovery and data transmission.

Conclusion

Graham J Fletcher's contributions to the field of data communication through his innovative patents highlight his role as a key inventor in this area. His work continues to influence the efficiency and reliability of data transmission technologies.