Jongsoo Lee

Title: Jongsoo Lee: Innovator in Radio Frequency Technology

Introduction

Jongsoo Lee is a prominent inventor based in Phoenix, AZ, known for his contributions to radio frequency technology. With a total of 2 patents, he has made significant advancements in the field, particularly in the design and efficiency of power amplifiers.

Latest Patents

One of Jongsoo Lee's latest patents is the "Radio frequency power detector and decision circuit used with DC supply voltage controlled power amplifiers." This invention provides a DC signal to circuitry that controls the DC supply voltage to an RF power amplifier. The DC signal is proportional to the amount of RF power detected within specified operating limits. When the RF power detected exceeds the maximum operating limit, the DC signal is set to its maximum value. Conversely, when the RF power detected falls below the minimum operating limit, the DC signal is set to its minimum value. This active RF power detector does not require an external DC reference voltage, and its high input impedance allows for the use of resistors to couple the RF input signal, resulting in a faster response time compared to passive envelope detectors.

Another notable patent is the "Sliding bias controller for use with radio frequency power amplifiers." This invention features a two-stage power amplifier circuit that employs both a DC to DC converter and a sliding bias controller to enhance power amplifier efficiency. The control signal generated by the power detector circuit regulates the input voltage to the DC to DC converter and provides the reference voltage for the sliding bias controller. This innovation reduces the quiescent current of the power amplifiers by lowering the bias currents and the DC voltage at lower power output levels. As the power level increases, the sliding bias controller adjusts its control on the bias currents, allowing the power amplifier to operate efficiently at higher power output levels.

Career Highlights

Jongsoo Lee is currently employed at RF Micro Devices, Inc., where he continues to develop innovative solutions in radio frequency technology. His work has significantly impacted the efficiency and performance of RF power amplifiers.

Collaborations

Jongsoo collaborates with Edward T Spears, contributing to advancements in their field through shared expertise and innovative ideas.

Conclusion

Jongsoo Lee's contributions to radio frequency technology through his patents demonstrate his commitment to innovation and efficiency in power amplification. His work continues to influence the industry and pave the way for future advancements.