David John Johnston

Title: David John Johnston - Innovator in Frequency Synthesis

Introduction

David John Johnston is a notable inventor based in Tavistock, GB. He has made significant contributions to the field of electronics, particularly in the development of voltage-controlled oscillators. His innovative work has led to the creation of a patent that enhances the functionality of frequency synthesizers.

Latest Patents

David holds a patent for a frequency synthesizer that comprises a voltage-controlled oscillator (VCO). This VCO includes means for fine-tuning the oscillator frequency and switchable capacitive elements for coarse tuning. The invention features first comparison means for comparing the frequency and phase of the VCO's output with a reference frequency signal, generating an error signal. This error signal is then utilized to fine-tune the oscillator frequency. Additionally, second comparison means are provided to compare the error signal against reference values, allowing for the control of the switchable capacitive elements to adjust the oscillator frequency accordingly.

Career Highlights

David Johnston is currently associated with Zarlink Semiconductor Limited, where he applies his expertise in electronic engineering. His work at Zarlink has been instrumental in advancing technologies related to frequency synthesis and signal processing.

Collaborations

David has collaborated with Richard Albon, contributing to the development of innovative solutions in their field. Their partnership has fostered advancements in electronic design and engineering.

Conclusion

David John Johnston's contributions to the field of frequency synthesis through his patented technology exemplify his innovative spirit and dedication to advancing electronic engineering. His work continues to influence the industry and inspire future innovations.