Alan J Davie

Title: Alan J Davie: Innovator in Receiver Technology

Introduction

Alan J Davie is a notable inventor based in Orpington, GB. He has made significant contributions to the field of receiver technology, holding a total of 3 patents. His work has been instrumental in advancing the capabilities of phasing and zero IF receivers.

Latest Patents

Davie's latest patents include innovative designs for phasing receivers and zero IF receivers. The phasing receiver patent describes a quadrature mixing arrangement that frequency converts an input signal to a pair of quadrature related low IF signals. These signals are processed through a polyphase filter that functions as both a low pass and adjacent channel rejection filter. The design incorporates elements that allow for fine adjustments of relative phase and amplitude, improving image rejection by compensating for mismatches in the filter's input stage.

In his zero IF receiver patent, Davie introduces an automatic gain control strategy that alters the gain of low pass filters while maintaining their bandwidths. This design utilizes gyrator filters, which consist of adjustable transconductors. The adjustments are made based on an estimate of the instantaneous signal amplitude of the received signal, enhancing the performance of the receiver.

Career Highlights

Alan J Davie has had a distinguished career, working with U.S. Philips Corporation, where he has contributed to various innovative projects. His expertise in receiver technology has positioned him as a key figure in the field.

Collaborations

Throughout his career, Davie has collaborated with notable individuals, including Paul A Moore and Anthony Richard Cusdin, who is now deceased. These collaborations have further enriched his work and contributions to the industry.

Conclusion

Alan J Davie's innovative patents and contributions to receiver technology highlight his significant role in advancing this field. His work continues to influence the development of modern communication systems.