Norbert Van Den Bos

Title: Norbert Van Den Bos: Innovator in Digital RF Power Amplification

Introduction

Norbert Van Den Bos is a notable inventor based in Wijchen, Netherlands. He has made significant contributions to the field of digital RF power amplification, holding a total of 5 patents. His work focuses on enhancing the efficiency of RF power amplifiers, which are crucial in various communication technologies.

Latest Patents

One of his latest patents is titled "Dutycycle adjustment to improve efficiency of a digital RF-PA." This invention describes an amplification unit that reduces the duty cycle of a digital signal at a carrier radio frequency. The goal is to optimize the efficiency of the RF power amplifier that amplifies the reduced duty cycle signal. The exemplary amplification unit includes a duty cycle controller and a digital power amplifier. A delay unit in the duty cycle controller applies a delay to an input digital signal at the carrier radio frequency, generating a delayed signal. A logic gate in the duty cycle controller combines the input digital signal with the delayed signal to produce a modified digital signal with a reduced duty cycle. Amplifying this modified digital signal in the digital RF power amplifier results in an amplified analog signal while improving amplifier efficiency.

Another significant patent is "Current saving by reduced modulation code and selective gating of RF signal." This invention involves a polar modulation power amplifier that utilizes both thermometer coded and binary coded amplitude modulation data. The thermometer coded data selectively activates one or more equally weighted power amplifier cells, while the binary coded data activates one or more binary weighted power amplifier cells. When less than full output power is needed, the power dissipated by RF signal buffers for unused power amplifier cells is significantly reduced by gating off the RF signal upstream of the buffers.

Career Highlights

Norbert has worked with prominent companies in the industry, including St-Ericsson SA and Ericsson Modems SA. His experience in these organizations has contributed to his expertise in RF power amplification technologies.

Collaborations

Throughout his career, Norbert has collaborated with notable professionals such as Hendrik Arend Visser and Roeland Heijna. These collaborations have likely enriched his work and led to innovative advancements in the field.

Conclusion

Norbert Van Den Bos is a distinguished inventor whose work in digital RF power amplification has led to several impactful patents. His contributions continue to influence the efficiency of communication technologies.