Huachang Xu

Title: Innovations of Huachang Xu in Voltage-Variation Detection

Introduction

Huachang Xu is a notable inventor based in Mountain View, California. He has made significant contributions to the field of integrated circuits, particularly in the area of voltage-variation detection. With a total of two patents to his name, Xu's work addresses critical challenges in electronic security.

Latest Patents

One of Huachang Xu's latest patents focuses on voltage-variation detection under clock fluctuations. Detecting voltage-based attacks on an integrated circuit (IC) is particularly challenging in the presence of clock jitter. Propagating signals can exhibit a total delay that results from both a delay component due to a voltage-based attack and a delay characteristic from clock fluctuation. The voltage-variation detection circuitry includes first and second voltage-dependent circuits along with a voltage analysis circuit. These voltage-dependent circuits produce first and second signals that indicate a voltage level responsive to a clock signal, based on different voltage sensitivities. The voltage analysis circuit generates a voltage alert signal based on these first and second signals. A combined signal neutralizes the delay characteristic in the first and second signals, while maintaining the delay component due to voltage variation. This innovative approach allows for the detection of voltage-based attacks even in the presence of clock fluctuations.

Career Highlights

Huachang Xu is currently employed at Google Inc., where he continues to develop cutting-edge technologies in the field of integrated circuits. His work has been instrumental in enhancing the security and reliability of electronic devices.

Collaborations

Some of Huachang Xu's notable coworkers include Emre Tuncer and Ramprasad Raghavan. Their collaborative efforts contribute to the advancement of technology at Google Inc.

Conclusion

Huachang Xu's innovations in voltage-variation detection represent a significant advancement in the field of integrated circuits. His contributions are vital for improving electronic security and reliability in modern technology.