Mitsunori Samata

Title: Innovations of Mitsunori Samata

Introduction

Mitsunori Samata is a notable inventor based in Tokyo, Japan. He has made significant contributions to the field of electronics, particularly in the development of phase-locked loop (PLL) circuits. With a total of 2 patents to his name, his work has had a considerable impact on digital circuit design.

Latest Patents

One of his latest patents focuses on a PLL circuit with improved phase difference detection. This innovation is particularly relevant in an all-digital phase-locked loop (ADPLL) system. The technique enhances phase difference detection when the phase difference is near zero. The feedback loop in this design includes a phase frequency detector (PFD) that compares the phases and frequencies of a reference signal and a feedback signal. Additionally, a time-to-digital converter (TDC) converts the PFD output into a digital value. A digital low-pass filter (DLF) removes high-frequency noise from the TDC output, while a digitally controlled oscillator (DCO) is regulated based on the DLF output. The design also incorporates a frequency divider (DIV) that outputs the feedback signal. An offset value is added at various points in the feedback loop, allowing for control of the feedback signal's phase and ensuring that a non-zero value is inputted to the TDC even when the ADPLL is locked.

Career Highlights

Mitsunori Samata has worked with prominent companies in the electronics industry, including Renesas Electronics Corporation and Epoch Microelectronics, Inc. His experience in these organizations has contributed to his expertise in circuit design and innovation.

Collaborations

Throughout his career, Mitsunori has collaborated with talented individuals such as Toshiya Uozumi and Keisuke Ueda. These collaborations have likely enriched his work and led to further advancements in his field.

Conclusion

Mitsunori Samata's contributions to the field of electronics, particularly through his innovative PLL circuit designs, highlight his role as a significant inventor. His work continues to influence the development of digital circuits and showcases the importance of innovation in technology.