Jeongjin Roh

Title: Jeongjin Roh: Innovator in Voltage Regulation Technology

Introduction

Jeongjin Roh is a notable inventor based in Ansan-si, South Korea. He has made significant contributions to the field of voltage regulation, holding three patents that showcase his innovative approach to electrical engineering.

Latest Patents

One of his latest patents is a voltage regulator featuring a capacitive feed-forward ripple cancellation circuit. This invention includes a pass unit that transfers input voltage to output voltage based on a control signal. It also has an error amplification unit that outputs a comparison signal based on the output voltage and a reference voltage. The capacitive feed-forward ripple cancellation unit effectively removes ripple from the input voltage, generating a control signal while minimizing power supply noise and quiescent current.

Another significant patent is a low dropout (LDO) voltage regulator. This device includes an amplifier that receives a reference voltage and feedback voltage, amplifying the difference between them. It features a buffer for buffering operations and a pass transistor that generates driving current. The design improves load regulation with a wide bandwidth, enhancing gain without increasing the size and current consumption of the internal transistor.

Career Highlights

Jeongjin Roh has worked with prominent organizations, including the Industry-University Cooperation Foundation at Hanyang University and Samsung Electronics. His experience in these institutions has allowed him to develop and refine his innovative technologies.

Collaborations

He has collaborated with notable colleagues such as Jong Pal Kim and Youngjae Jung, contributing to advancements in his field.

Conclusion

Jeongjin Roh's work in voltage regulation technology exemplifies his commitment to innovation and engineering excellence. His patents reflect a deep understanding of electrical systems and a drive to improve their efficiency and performance.