Edward Lloyd Henderson

Title: Edward Lloyd Henderson: Innovator in Phase Locked Loops and Telephone Technology

Introduction

Edward Lloyd Henderson is a notable inventor based in Kanata, Canada. He holds 2 patents that showcase his contributions to technology, particularly in the fields of phase locked loops and telephone systems. His innovative work has had a significant impact on electronic communication.

Latest Patents

Henderson's latest patents include the "Averaging Zero Phase Start for Phase Locked Loops." This invention features a phase locked loop that incorporates an average zero phase start circuit. This circuit is designed to detect and correct the average phase difference between a data signal and a VCO clock signal during the initial phase-lock acquisition. The circuit utilizes a data comparator to divide the data stream into odd and even portions, along with pulse position detectors to measure the phase difference between the data signals and the VCO clock. A ramp generator is employed to produce a voltage that corresponds to the sum of the detected phase differences, ensuring precise phase alignment.

Another significant patent is the "Electronic Tone Ringer Control Circuit for a Telephone Set." This circuit controls the on-off ringing of a line-powered electronic tone ringer in a telephone. It includes a variable rate charge-discharge suppression circuit that effectively prevents high voltage transient spikes from actuating the tone ringer while still responding to the appropriate ringing signal.

Career Highlights

Throughout his career, Henderson has worked with prominent companies such as Quantum Corporation and Northern Telecom Limited. His experience in these organizations has contributed to his expertise in electronic systems and innovations.

Collaborations

Henderson has collaborated with notable individuals in the field, including Russell W. Brown and Toai A. Doan. These partnerships have likely enriched his work and led to further advancements in technology.

Conclusion

Edward Lloyd Henderson's contributions to the fields of phase locked loops and telephone technology demonstrate his innovative spirit and technical expertise. His patents reflect a commitment to enhancing electronic communication systems.