Chun Fai Wong is a notable inventor based in Hong Kong, CN. He has made significant contributions to the field of technology, holding a total of 8 patents. His work primarily focuses on advancements in sensor technology and current drivers.

Latest Patents

One of his latest patents is the "Single-temperature-point temperature sensor sensitivity calibration." This invention assumes that all sensitivity lines converge at absolute zero temperature, allowing calibration measurement at only one temperature. The sensor output voltage is generated by current from a mirrored current source flowing through a variable resistor. During calibration, adjustments are made to the resistance of the variable resistor and the mirror ratio of the mirrored current source. An error amplifier is utilized to compare voltages generated by unit currents, facilitating the adjustment of the unit current sources and the mirrored current source. Each unit current flows through a grounded-base PNP transistor, with a switchable PNP transistor in parallel to adjust the PNP current for two measurements. The difference between these measurements is compared to a calibration target to ensure accuracy.

Another significant patent is the "Low-headroom constant current source for high-current applications." This invention features a low-headroom current driver that does not rely on an op amp or resistor. A sensing transistor, connected to the output transistor, senses variations in output current. The gate, source, and drain voltages of the sensing transistor are mirrored to control a sense current. An error between the mirrored sense current and a fixed reference current is stored as charge on an error-storing capacitor. This stored error charge creates a negative-feedback compensation current that adjusts the gate voltage generated by a feedback-driving transistor. The adjusted gate voltage then controls the output transistor to compensate for variations in output current.

Career Highlights

Chun Fai Wong is currently employed at the Hong Kong Applied Science and Technology Research Institute Company Limited. His work at this institute has allowed him to explore and develop innovative technologies that have practical applications in various fields.

Collaborations

Chun Fai Wong has collaborated with several talented individuals, including Kam Hung Chan and Kwok Kuen (David) Kwong. Their teamwork has contributed to the successful development of various projects and patents.

Conclusion

Chun Fai Wong's contributions to technology through his patents demonstrate his innovative spirit and dedication to advancing the field. His work continues to

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