Hee Cheol Joo

Title: Hee Cheol Joo and Low-Dropout Regulator Innovation.

Introduction

Hee Cheol Joo is an inventor associated with Soongsil University in Seoul, South Korea. His patent work includes an innovation in low-dropout (LDO) regulator circuitry designed to reduce supply-voltage noise.

Latest Patents

Joo is credited with 1 patent: “LDO Regulator Circuit Apparatus Capable of Attenuating Supply Voltage Noise.” The disclosed apparatus combines a flipped voltage follower regulator with an error-amplifying circuit that compares a reference signal with feedback from the output. A common-gate circuit amplifies the feedback-loop gain, while a super source follower buffers its output and delivers it to the pass transistor’s gate. Together, these circuit elements are intended to attenuate supply-voltage noise.

Career Highlights

Joo’s listed patent reflects work on power-management circuitry, particularly techniques for improving the noise performance of LDO regulators. The available information associates him with Soongsil University.

Collaborations

The supplied information names Young Ha Hwang and Yoo Chang Kim as Joo’s coworkers. It does not specify their roles in the patent or the nature of their collaboration.

Conclusion

Hee Cheol Joo’s patent describes an LDO regulator design that uses feedback amplification and buffering to address supply-voltage noise. This work highlights his contribution to circuit innovation associated with Soongsil University.