Chao-Shi Chuang

Title: Innovations of Chao-Shi Chuang

Introduction

Chao-Shi Chuang is a notable inventor based in Tainan Hsien, Taiwan. He has made significant contributions to the field of technology, particularly in the area of phase lock loops. With a total of four patents to his name, Chuang's work has had a considerable impact on wireless communication systems.

Latest Patents

Chuang's latest patents include a "Phase lock loop and operating method thereof." This invention provides a PLL that comprises a first divider, a phase frequency detector (PFD), a loop filter, a voltage-controlled oscillator (VCO), a second divider, and a controller. The first divider receives a reference signal and divides it to obtain a divided signal. The PFD compares this divided signal with a feedback signal to generate a comparison output. The VCO selects one of several operating curves for oscillation based on a selection signal and generates an oscillation signal based on the operating voltage produced by the loop filter. The second divider then divides the oscillation signal to obtain the feedback signal. The controller operates in an initial mode to determine the selection signal by calculating differences between the feedback signal and the divided signal. Once the selection signal stabilizes, the PLL switches to a normal mode to operate on the corresponding curve. Another significant patent is for "Automatic frequency tuning in a phase lock loop." This method is designed for automatic frequency tuning in multi-band VCO wireless systems, which have limited initial frequency lock times. It involves selecting a predetermined subset of VCOs as interpolation points, pre-calibrating them, and storing the resulting frequency for each in memory. When a desired frequency is input, an appropriate VCO is selected by interpolation using the stored (frequency, VCO) pairs.

Career Highlights

Chao-Shi Chuang is currently employed at Airoha Technology Corporation, where he continues to innovate and develop advanced technologies. His work has been instrumental in enhancing the performance and efficiency of wireless communication systems.

Collaborations

Chuang has collaborated with several talented individuals, including Chung-Cheng Wang and Wen-Shih Lu, who contribute to the innovative environment at Airoha Technology Corporation.

Conclusion

Chao-Shi Chuang's contributions to the field of technology, particularly through his patents related to phase lock loops, demonstrate his expertise and commitment to innovation. His work