Ka Lok (Roy) Ng

Title: Innovations of Ka Lok (Roy) Ng

Introduction

Ka Lok (Roy) Ng is a prominent inventor based in Hong Kong, CN. He has made significant contributions to the field of electrical engineering, particularly in the development of advanced power conversion technologies. With a total of 2 patents, his work showcases innovative solutions that address critical challenges in the industry.

Latest Patents

One of his latest patents is titled "Flexible array of DC-DC converters reconfigurable using a shared serial bus." This invention involves a re-configurable bank of DC-DC converters that features multiple channels, each equipped with a DC-DC converter and a controller. The controller senses the channel's output voltage and current, adjusting the duty cycle of switch signals accordingly. A serial bus connects all controllers, allowing for digital voltage and current control targets to be written into each controller. The system utilizes Digital-to-Analog Converters (DACs) to convert these targets into analog voltages, which are then compared to the sensed output voltage and current. The results of this comparison are used to generate pulses of switch signals, with the duty cycle adjusted based on the target comparisons.

Another notable patent is "Digital frequency dithering for switched-mode power supplies (SMPS) using triangular, asymmetric cubic, or random cubic spread spectrum oscillators." This invention focuses on reducing Electro-Magnetic Interference (EMI) by spreading the spectrum of a generated clock. A modulator charges a capacitor with a variable current to create a ramp voltage, which is compared to a reference to determine the end of a clock cycle. An up-down counter drives a DAC that controls the variable charging current, providing triangle modulation. The invention also incorporates cubic modulation and pseudo-random current sources to further enhance frequency modulation.

Career Highlights

Ka Lok (Roy) Ng is currently employed at High Tech Technology Limited, where he continues to innovate and develop cutting-edge technologies. His expertise in power electronics and control systems has positioned him as a valuable asset to his company.

Collaborations

He collaborates with talented coworkers, including Chik Wai (David) Ng and Kit Wing (Simon) Lee, who contribute to the dynamic environment of innovation at High Tech Technology Limited.

Conclusion

Ka Lok (Roy) Ng's contributions to the field of electrical engineering through his patents demonstrate his commitment to advancing technology. His innovative solutions