Company Filing History:
Years Active: 1994-1995
Title: Innovations of Jenn-Gang Chern
Introduction
Jenn-Gang Chern is an accomplished inventor based in Yorba Linda, CA (US). She has made significant contributions to the field of technology, particularly in the area of frequency synthesizers and phase-locked loops. With a total of 3 patents to her name, her work showcases her innovative spirit and technical expertise.
Latest Patents
One of Jenn-Gang Chern's latest patents is a method and apparatus for programmable damping factor of a phase locked loop. This invention describes a timing acquisition circuit that utilizes programmable damping for either Type A or Type B phase detectors. In the damping scheme for a Type A phase detector, a resistance is simulated by adding an equivalent voltage to the capacitor voltage. This equivalent voltage is generated internally, allowing for programmable damping. For Type B phase detectors, a variable gain amplifier is employed to control the effective resistance of the loop filter.
Another notable patent is the time-based data separator zone change sequence. This invention provides a method and apparatus for managing initial transients in a frequency synthesizer by controlling the start-up sequence of the device. The start-up sequence includes several steps, such as resetting the voltage-controlled oscillator(s) to ensure they are in a known state during start-up. The charge pump and phase detector of the phase-locked loop are disabled, and new data values are loaded into the counters and registers that control the frequency of the VCO(s). This method ensures that the center frequency of the VCO is settled when changing frequencies, preventing issues during operation.
Career Highlights
Jenn-Gang Chern is currently employed at Siliconsystems, Inc., where she continues to innovate and develop new technologies. Her work has had a significant impact on the field, and her patents reflect her dedication to advancing technology.
Collaborations
Throughout her career, Jenn-Gang has collaborated with talented individuals such as Rodney T Masumoto and Tzu-Wang Pan. These collaborations have contributed to her success and the development of her innovative ideas.
Conclusion
Jenn-Gang Chern is a remarkable inventor whose contributions to technology are evident through her patents and work at Siliconsystems, Inc. Her innovative approaches to frequency synthesizers and phase-locked loops demonstrate her expertise and commitment to advancing the field.