Tokyo, Japan

Toshio Kumamoto

This inventor holds 62 USPTO granted patents, primarily in Semiconductor Devices (CPC class H03F). Top assignees: Mitsubishi Denki Kabushiki Kaisha, Renesas Electronics Corporation, Renesas Technology Corp.. Active years: 1987-2016.


% Patents Active = 75.8

Average Co-Inventor Count = 2.7

ph-index = 13

Forward Citations = 537(Granted Patents)

Forward Citations (Not Self Cited) = 524(Dec 10, 2025)


Inventors with similar research interests:


Location History:

  • bothh of Itami, JP (1993)
  • Itami, JP (1987 - 1996)
  • Hyogo-ken, JP (1996)
  • Hyogo, JP (1991 - 2012)
  • Kanagawa, JP (2012 - 2015)
  • Tokyo, JP (1997 - 2016)

Company Filing History:


Years Active: 1987-2016

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Areas of Expertise:
Signal Processing Circuit
Delta-Sigma A/D Converter
Semiconductor Device
Oscillator Circuit
Modulator
Digital-to-Analog Converter
Capacitance Element
Voltage Comparator
Folding Type A/D Converter
Pipeline Type A/D Converter
Resistor Elements
Differential Transistor Pair
62 patents (USPTO):Explore Patents

Title: Innovations and Contributions of Toshio Kumamoto

Introduction

Toshio Kumamoto, an accomplished inventor based in Tokyo, Japan, has made significant contributions to the field of signal processing and circuit design. With an impressive portfolio of 62 patents, his work continues to influence technology in various domains.

Latest Patents

Among his latest innovations are several pivotal patents. One notable patent focuses on a signal processing circuit that incorporates a chopper amplifier equipped with a differential amplifier circuit. This circuit amplifies differential input signals Vsp(t) and Vsm(t), while an adder circuit generates an addition signal Vfil(t) by combining the chopper output signal Vsub(t). The process involves interchanging differential signals inputted into the differential amplifier circuit for every first phase period and second phase period, ensuring the adder circuit efficiently creates the addition signal in both phases. Additionally, he has developed a resolver digital converter and a multipath nested mirror amplifier, which further exemplify his expertise in signal processing technology.

Career Highlights

Kumamoto’s illustrious career includes significant roles at prominent companies such as Mitsubishi Denki Kabushiki Kaisha and Renesas Electronics Corporation. His experience in these leading electronics firms has equipped him with the knowledge and skills necessary to innovate in circuit design and signal processing.

Collaborations

Throughout his career, Kumamoto has collaborated with esteemed professionals in the industry, including Takashi Okuda and Takahiro Miki. These collaborations have fostered a creative environment, enabling the development of groundbreaking inventions and advancements in technology.

Conclusion

Toshio Kumamoto remains a prominent figure in the field of signal processing, with numerous patents to his name that reflect his deep understanding of circuit design. His work has not only enhanced technological capabilities but also set a standard for future innovations in the industry. As technology continues to evolve, the contributions of inventors like Kumamoto will undoubtedly play a vital role in shaping the future.

Profile summary based on public USPTO records.
Please report any incorrect information to [email protected]
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