David Nelson Alldred

Title: David Nelson Alldred: A Leader in Analog-to-Digital Converter Innovations

Introduction

David Nelson Alldred is a prominent inventor based in Toronto, Canada, known for his groundbreaking work in the field of analog-to-digital converters (ADCs). With an impressive portfolio comprising 13 patents, Alldred has made significant contributions to the technological advancements in this area, particularly focusing on residue generation systems that enhance the performance of continuous-time and hybrid ADCs.

Latest Patents

Among Alldred's latest patents is his work on "Blocker tolerance in continuous-time residue generating analog-to-digital converters." This innovative system incorporates a filter—such as a finite impulse response (FIR) filter—to produce a filtered analog output based on the analog input. By utilizing a quantizer to generate a digital input for a feedforward digital-to-analog converter (DAC), the system effectively generates a feedforward path analog output. The inclusion of a subtractor allows for the creation of a residue signal, thus allowing blockers to be attenuated before they are sampled and aliased by the quantizer. This design notably minimizes overhead in both design and power dissipation.

In another significant patent, titled "Reducing residue signals in analog-to-digital converters," Alldred proposed a residue generation apparatus that enhances traditional ADCs. This apparatus includes a quantizer that digitizes the analog input, coupled with mechanisms to apply transfer functions to the digital outputs and generate necessary analog outputs for further processing. The novel approach allows the selection of various combinations of transfer functions to effectively reduce the residue signal reaching subsequent ADC stages.

Career Highlights

David Nelson Alldred's career features key roles at leading technology firms. He has contributed his expertise while working with Analog Devices and its subsidiary, Analog Devices Global Unlimited Company. His work within these organizations has cemented his reputation as a key player in advancing ADC technologies.

Collaborations

Throughout his career, Alldred has collaborated with talented professionals, including Trevor Clifford Caldwell and Hajime Shibata. These collaborations have likely fostered innovation and facilitated the development of his advanced patent technologies.

Conclusion

David Nelson Alldred stands out as a visionary inventor whose contributions to the field of analog-to-digital converters are shaping the future of digital technology. His 13 patents reflect his dedication to improving the efficiency and effectiveness of ADC systems, making him an important figure in the realm of innovations and inventions. The impact of his work continues to resonate within the industry and will influence future developments in electronic communication and signal processing.