Yoo Jin Jang

Title: Yoo Jin Jang: Innovator in Frequency Mixing and Cascode Circuit Technology

Introduction

Yoo Jin Jang is a prominent inventor based in Daejeon, South Korea. He has made significant contributions to the field of electronics, particularly in the development of frequency mixers and cascode circuits. With a total of 3 patents to his name, Jang continues to push the boundaries of innovation in telecommunications.

Latest Patents

One of Yoo Jin Jang's latest patents is a frequency mixer that includes a non-linear circuit. This invention features a first matching circuit that generates a matched local oscillator (LO) signal based on an LO signal. The non-linear circuit generates a non-linear LO signal based on the matched LO signal. Additionally, a second matching circuit generates a matched radio frequency (RF) signal based on an RF signal. The mixing circuit then generates a mixed signal based on the mixing of the non-linear LO signal and the matched RF signal. A third matching circuit generates an intermediate frequency (IF) signal based on the mixed signal, with the non-linear circuit comprising a non-linear transistor, a bias transistor, and an internal matching circuit connected in series.

Another notable patent is a cascode switch circuit that includes a level shifter. This circuit comprises first and second transistors connected in cascode form between a drain terminal and a source terminal. The level shifter changes the voltage level of a switching control signal applied to the gate terminal and provides the changed signal to the gate of the first transistor. A buffer delays the switching control signal and provides the delayed signal to the gate of the second transistor, with a first resistor connected between the level shifter and the gate of the first transistor.

Career Highlights

Yoo Jin Jang is currently employed at the Electronics and Telecommunications Research Institute, where he continues to innovate and develop new technologies. His work has been instrumental in advancing the field of telecommunications, particularly in the areas of signal processing and circuit design.

Collaborations

Some of his notable coworkers include Dong Min Kang and Byoung-Gue Min, who have collaborated with him on various projects within the institute.

Conclusion

Yoo Jin Jang is a dedicated inventor whose work in frequency mixing and cascode circuit technology has made a significant impact in the field of electronics. His innovative patents reflect his commitment to advancing telecommunications technology.