Soo-jung Chang

Title: Soo-jung Chang: Innovator in Track Error Detection Technology

Introduction

Soo-jung Chang is a notable inventor based in Suwon, South Korea. He has made significant contributions to the field of optical recording and reproducing technologies. With a total of 3 patents to his name, Chang's work focuses on enhancing the accuracy and reliability of track error detection devices.

Latest Patents

One of Chang's latest patents is a track error detection device that includes a function for removing phase offsets. This innovative device addresses errors generated by circuit malfunctions. It features an equalizing unit that levels input signals A, B, C, and D, a comparison unit for quantizing these signals, and a phase shifting unit that removes phase offsets based on control signals. The system control unit provides these control signals, ultimately improving the accuracy and reliability of the detected track error signal. Additionally, by adjusting the phases of the quantized signals, the device reduces power consumption and hardware size.

Another significant patent is a writable area detection device for optical recording and reproducing apparatuses. This device comprises a waveform rectification unit that compares an RF signal from a user data area with a reference signal, outputting a rectified pulse signal. It also includes a pulse generation unit that creates a signal with a pulse width containing a section where a high-frequency signal is regularly distributed. A latch unit latches this generated signal, while a detection unit identifies the section of the high-frequency signal using outputs from both the latch and pulse generation units.

Career Highlights

Soo-jung Chang is currently employed at Samsung Electronics Co., Ltd., where he continues to innovate in the field of optical technologies. His work has contributed to advancements in the efficiency and effectiveness of optical recording devices.

Collaborations

Chang has collaborated with several talented individuals, including Jeong-won Lee and Jung-eun Lee, who have also contributed to the development of innovative technologies in their respective fields.

Conclusion

Soo-jung Chang's contributions to the field of optical recording and reproducing technologies highlight his innovative spirit and dedication to improving device performance. His patents reflect a commitment to enhancing accuracy and efficiency in technology, making him a significant figure in the industry.