Company Filing History:
Years Active: 2014-2017
Title: Innovations of Leung Ling (Alan) Pun
Introduction
Leung Ling (Alan) Pun is a notable inventor based in Hong Kong, CN. He has made significant contributions to the field of temperature sensing technology. With a total of 4 patents to his name, his work showcases innovative approaches to on-chip temperature sensor circuits.
Latest Patents
Among his latest patents is a differential temperature sensor with sensitivity set by current-mirror and resistor ratios without limiting DC bias. This invention allows for the implementation of a differential on-chip temperature sensor circuit using standard complementary metal-oxide-semiconductor (CMOS) processes with PNP transistors. The design features a pair of transistors with collector currents sensitive to voltage, both directly and due to saturation currents. A scaling resistor connects to the emitter of one transistor, and its voltage is compared to the other transistor's emitter voltage by an error amplifier. This setup generates a bias voltage to current sources that are proportional to absolute temperature, effectively subtracting out saturation current sensitivity. The current is mirrored to sink current through a multiplier resistor from an output. An amplifier connected across the multiplier resistor compares a reference voltage to set the DC bias independent of temperature sensitivity. The temperature sensitivity is proportional to the ratio of the multiplier resistor and the scaling resistor, multiplied by a mirroring factor, providing a differential output.
Another significant patent is the CMOS temperature sensor with sensitivity set by current-mirror and resistor ratios without limiting DC bias. This invention also utilizes a standard CMOS process with PNP transistors and shares similar features with the previous patent, emphasizing the innovative design and functionality of on-chip temperature sensors.
Career Highlights
Leung Ling (Alan) Pun is currently associated with the Hong Kong Applied Science and Technology Research Institute Company Limited. His work at this institution has allowed him to explore and develop advanced technologies in temperature sensing.
Collaborations
He has collaborated with notable coworkers such as Chun Fai Wong and Kwok Kuen (David) Kwong, contributing to various projects and innovations in the field.
Conclusion
Leung Ling (Alan) Pun's contributions to temperature sensing technology through his patents reflect his innovative spirit and dedication to advancing the field. His work continues to influence the development of efficient and effective temperature sensor circuits.