Leonardus Hesen

Title: Leonardus Hesen: Innovator in RF Technology

Introduction

Leonardus Hesen is a notable inventor based in Hegelsom, Netherlands. He has made significant contributions to the field of radio frequency (RF) technology, holding a total of 4 patents. His innovative designs focus on improving the efficiency and performance of RF circuits.

Latest Patents

Hesen's latest patents include a high-speed RF divider and an RF duty cycle correction circuit. The high-speed RF divider features designs based on inverters and clocking circuits arranged in a serial ring formation. This design utilizes only NMOS transistors in the inverters and PMOS transistors in the clocking circuits, employing just 12 transistors. The input can be directly coupled to a voltage-controlled oscillator (VCO) output, minimizing loading by connecting each VCO output to only two transistors. Another embodiment includes clocked inverter stages in a serial ring configuration, enhancing speed by using the RF clock at the outer side of the inverters.

The RF duty cycle correction circuit consists of multiple AC-coupled, independently-biased inverter stages connected in series. A periodic signal is applied to the input of these stages, with each inverter stage featuring a resistive element in feedback. This design allows for DC isolation between stages while maintaining independent DC bias, enabling precise control over the transition points of the periodic signal.

Career Highlights

Throughout his career, Leonardus Hesen has worked with prominent companies such as ST-Ericsson and STMicroelectronics. His experience in these organizations has contributed to his expertise in RF technology and circuit design.

Collaborations

Hesen has collaborated with notable professionals in the field, including Paul Mateman and Johannes Antonius Frambach. These collaborations have further enriched his work and innovations in RF technology.

Conclusion

Leonardus Hesen is a distinguished inventor whose contributions to RF technology have led to significant advancements in circuit design. His innovative patents reflect his commitment to enhancing the efficiency and performance of RF systems.