Chang Hwa Rob Yang

Title: Chang Hwa Rob Yang: Innovator in Electrical Device Charging Systems

Introduction

Chang Hwa Rob Yang is a notable inventor based in San Jose, CA. He has made significant contributions to the field of electrical device charging systems, holding a total of 5 patents. His innovative work focuses on enhancing the safety and efficiency of charging wearable devices.

Latest Patents

One of his latest patents is for a system that controls the charging of electrical devices. This charger prevents the charging of a wearable device battery when sweat or another conductive contaminant is present. The charger initially provides a low voltage to detect when the wearable device is engaged. When the device is engaged, a measured current value exceeds a threshold minimum value. If sweat or another conductive contaminant is present, the additional conductive pathway provided by the contaminant will cause the measured value to exceed a threshold maximum, preventing battery charging. If no contaminant is present, the measured value will be greater than the threshold minimum and less than the threshold maximum, allowing a higher voltage to charge the battery. When the device is removed from the charger, the measured value will decrease below the threshold minimum, and the charger may return to providing low voltage to detect engagement.

Another significant patent is for a synchronous voltage signature data collection apparatus. This apparatus is designed to concurrently measure multiple input voltages at a high sampling data rate, such as at least two mega-samples per second. It includes a plurality of voltage data acquisition components that concurrently sample different input voltages and produce respective voltage data samples. Each component is directly coupled to a field programmable gate array that receives the voltage data samples, packetizes them, and provides the packetized voltage data samples to a system on chip.

Career Highlights

Chang Hwa Rob Yang is currently employed at Amazon Technologies, Inc., where he continues to innovate and develop new technologies. His work has significantly impacted the way electrical devices are charged, ensuring user safety and device efficiency.

Collaborations

He has collaborated with talented coworkers, including Nayana Teja Chiluvuri and Xunwei Yu, contributing to various projects and advancements in technology.

Conclusion

Chang Hwa Rob Yang is a prominent inventor whose work in electrical device charging systems has led to important advancements in safety and efficiency. His contributions continue to shape the future of wearable technology.