Company Filing History:
2 out of 9 
1 out of 9,150 
Years Active: 1998-2004
Title: Innovations of Jean-Ming Lee
Introduction
Jean-Ming Lee is a notable inventor based in Hsinchu, Taiwan. He has made significant contributions to the field of technology, particularly in the development of digital echo cancellers and voltage-controlled oscillators. With a total of 3 patents to his name, Lee's work has had a considerable impact on the industry.
Latest Patents
One of his latest patents is an "Apparatus for a digital echo canceller and method therefor." This invention utilizes a designed selector to estimate the length of a cable by using values of receiving and input signals. It allows for the selection of response values from an insignificant part of the echo signal. By performing multiplication and addition operations in the response region of a significant part of the echo signal, an estimated echo signal is produced to effectively cancel the echo signal. This innovation reduces unnecessary operations and hardware costs. Another significant patent is the "Voltage-controlled oscillator," which features a voltage compensation transistor. This transistor provides an equivalent resistance to the bias voltage supplied to the oscillator. In the event of a sudden increase in the power supply voltage, the equivalent resistance of the compensation transistor drops, allowing the bias voltage to be adjusted, thereby modifying the oscillation frequency of the ring oscillator.
Career Highlights
Throughout his career, Jean-Ming Lee has worked with various esteemed organizations. He has been associated with Topic Semiconductor Corporation and the Industrial Technology Research Institute. His experience in these companies has contributed to his expertise and innovative capabilities.
Collaborations
Lee has collaborated with several professionals in his field, including Chu-Chiao Yu and Shaw-Jia Hor. These collaborations have likely enriched his work and led to further advancements in technology.
Conclusion
Jean-Ming Lee's contributions to technology through his patents and collaborations highlight his role as an influential inventor. His work continues to inspire advancements in the field of electronics and signal processing.