Location History:
- Cupertino, CA (US) (1998)
- Saratoga, CA (US) (2007)
Company Filing History:
Years Active: 1998-2007
Title: Innovations of Chi-Hung Hui
Introduction
Chi-Hung Hui is a notable inventor based in Saratoga, California. He has made significant contributions to the field of semiconductor technology, holding a total of 2 patents. His work primarily focuses on enhancing the functionality and efficiency of electronic components.
Latest Patents
One of Chi-Hung Hui's latest patents is for a visual or multimedia interface bus switch with level-shifted ground and input protection against non-compliant transmission-minimized differential signaling (TMDS) transmitter. This innovative bus switch chip operates with a power-supply voltage of 1.8 volts relative to a 0-volt ground. The differential bus signals switched through the chip swing from 2.7 to 3.3 volts, exceeding the specified power-supply voltage. To address this, the chip is level-shifted by applying a 1.5-volt signal as its ground and a 3.3-volt signal as its power supply. This design ensures that the chip's net power supply remains within specification. Additionally, the patent addresses the issue of non-compliant video transmitters that may drive differential signals to ground when disabled, incorporating external pullup resistors or internal pullup transistors to prevent damage.
Another significant patent by Hui involves an avalanche-enhanced CMOS transistor for EPROM/EEPROM and ESD-protection. This non-volatile memory cell utilizes a p+ diffusion region spaced from the n+ drain of the n-channel programmable transistor. A diode between these regions generates electrons during avalanche breakdown, enhancing programming efficiency. The design allows for programming at lower drain voltages, eliminating the need for a charge pump. This diode can also serve as input-protection for ESD devices.
Career Highlights
Chi-Hung Hui is currently associated with Pericom Semiconductor Corporation, where he continues to innovate in the semiconductor industry. His work has contributed to advancements in electronic components that are crucial for modern technology.
Collaborations
Chi-Hung Hui has collaborated with notable colleagues such as Paul C. Tong and Xianxin Li, further enhancing the impact of his work in the field.
Conclusion
Chi-Hung Hui's contributions to semiconductor technology through his innovative patents demonstrate his expertise and commitment to advancing electronic components. His work continues to influence the industry and pave the way for future innovations.