Chik Yam Lee

Title: The Innovations of Chik Yam Lee

Introduction

Chik Yam Lee is a notable inventor based in Courtaboeuf, France. He has made significant contributions to the field of electronics, particularly in the development of advanced drive systems. With a total of 7 patents to his name, Lee's work has had a considerable impact on the industry.

Latest Patents

One of his latest patents is a method for operating an H-bridge drive utilizing a pair of high and low side MOSFETs. This invention features a fully protected H-bridge for a direct current motor, which consists of two high side MOSFETs and a control and logic integrated circuit (IC) on a first conductive heat sink, all within a single package. The design includes two discrete low side MOSFETs, with the entire bridge controlled by the IC. It also incorporates shoot-through protection for each leg and a PWM soft start sequence, programmed by an external, chargeable RC circuit. Input signals to the high side MOSFETs select the operation modes, while protective circuits are provided for short circuit current and overcurrent conditions. Additionally, sleep mode and braking/non-braking control are included.

Another significant patent is for a MOSFET gate driver with a negative gate bias voltage. This circuit prevents shoot-through in a high side switching transistor that is coupled in series with a low side switching transistor across a supply voltage. The circuit comprises a voltage reference circuit that provides a reference voltage, which is negative with respect to the supply voltage. This reference voltage is applied to the control electrode of the high side switching transistor when it is off, and the source of the high side switching transistor exceeds the reference voltage while the low side switching transistor is on.

Career Highlights

Chik Yam Lee has worked with prominent companies in the electronics sector, including International Rectifier Corporation. His experience in these organizations has allowed him to refine his skills and contribute to innovative projects.

Collaborations

Throughout his career, Lee has collaborated with talented individuals such as Vincent Thiery and Bruno Charles Nadd. These partnerships have fostered a creative environment that has led to the development of groundbreaking technologies.

Conclusion

Chik Yam Lee's contributions to the field of electronics through his patents and collaborations highlight his innovative spirit and dedication to advancing technology. His work continues to influence the industry and