Chang Jun Oh

Title: Chang Jun Oh: Innovator in Frequency Tuning and Amplification Technologies

Introduction

Chang Jun Oh is a prominent inventor based in Taejon, South Korea. He has made significant contributions to the field of electronics, particularly in the development of advanced tuning circuits and variable gain amplifiers. With a total of four patents to his name, his work has had a substantial impact on the industry.

Latest Patents

One of Chang Jun Oh's latest patents is titled "Low offset automatic frequency tuning circuits for continuous-time filter." This invention focuses on a tuning circuit designed to minimize variations in the cutoff frequency of Gm-C type continuous-time filters. The circuit includes integrating means for generating signals, offset sampling means for sampling offset voltages, comparative signal generating means for creating reference signals, and control means for regulating Gm values.

Another notable patent is the "CMOS variable gain amplifier and control method therefor." This invention features a high-frequency variable gain amplifier that allows for wide gain variation characteristics. It utilizes both the saturation and linear regions of input differential transistors to achieve high gain with minimal distortion. The amplifier's gain characteristics can be controlled in an exponential function relative to the control voltage.

Career Highlights

Chang Jun Oh has worked with reputable organizations such as the Electronics and Telecommunications Research Institute and Korea Telecom. His experience in these institutions has allowed him to refine his skills and contribute to groundbreaking technologies in the field of electronics.

Collaborations

Throughout his career, Chang Jun Oh has collaborated with notable colleagues, including Won Chul Song and Jong Ryul Lee. These partnerships have fostered innovation and have been instrumental in the development of his patented technologies.

Conclusion

Chang Jun Oh is a distinguished inventor whose work in frequency tuning and amplification technologies has advanced the field of electronics. His patents reflect a commitment to innovation and excellence, making him a key figure in the industry.