Jen-Chung Chang

Title: Innovations of Inventor Jen-Chung Chang

Introduction

Jen-Chung Chang is a notable inventor based in Taoyuan County, Taiwan. He has made significant contributions to the field of electronics, particularly in the development of frequency-converting circuits and phase-locked loops. With a total of 4 patents to his name, Chang's work has had a considerable impact on modern technology.

Latest Patents

One of his latest patents is a frequency-converting circuit and down converter. This invention is designed to convert an RF signal into a first baseband signal using a poly-phase local oscillator (LO) signal. The circuit includes a coupler, a first transduction unit, and a first switching unit, which work together to amplify and switch the RF signal to produce the desired output.

Another significant patent by Chang is related to a phase-locked loop (PLL) that incorporates phase shifters to adjust the phase of an input signal. This invention utilizes phase frequency detectors to generate phase difference signals, which are then used by charge pumps to control output voltages. The output from a voltage-controlled oscillator (VCO) is further processed to produce a frequency division output signal.

Career Highlights

Throughout his career, Jen-Chung Chang has worked with prominent organizations such as United Microelectronics Corporation and National Taiwan University. His experience in these institutions has allowed him to refine his skills and contribute to various innovative projects.

Collaborations

Chang has collaborated with notable colleagues, including Chia-Jung Hsu and Shey-Shi Lu. These partnerships have fostered a creative environment that has led to the development of groundbreaking technologies.

Conclusion

Jen-Chung Chang's contributions to the field of electronics through his patents and collaborations highlight his innovative spirit and dedication to advancing technology. His work continues to influence the industry and inspire future inventors.