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For the Inventor, By the Inventor

Kyoto, Japan

Mitsuteru Sakai

This inventor holds 16 USPTO granted patents and 5 published patent applications. Top assignee: Rohm Co., Ltd.. Active years: 2012-2025.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Mitsuteru Sakai. Retrieved from https://idiyas.com/inventor/mitsuteru-sakai

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

USPTO Granted Patents = 16 

% Patents Active = 100.0

Average Co-Inventor Count = 1.1

ph-index = 2

Forward Citations = 13(Granted Patents)


Company Filing History:

goldMedal16 out of 6,021 
 
Rohm Co., Ltd.
 patents

Years Active: 2012-2025

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16 patents (USPTO):Explore Patents
1. 12401330 - Audio circuit (2025-08-26),
2. 12348242 - D/A converter (2025-07-01),
3. 12309556 - Audio circuit (2025-05-20),
4. 12069452 - Audio circuit for interfacing with digital or analog audio signals (2024-08-20),
5. 11146226 - Analog switch circuit, volume circuit, and semiconductor integrated circuit (2021-10-12),
6. 10938363 - Audio circuit (2021-03-02),
7. 10824187 - Digital signal processing circuit, audio device, and electronic device (2020-11-03),
8. 10506340 - Digital signal processor for audio, in-vehicle audio system and electronic apparatus including the same (2019-12-10),
9. 10063249 - Audio circuit for suppressing DC shock noise (2018-08-28),
10. 9143104 - Audio signal processing circuit, car audio apparatus using the same, audio component apparatus, electronic device and output audio signal generating method (2015-09-22),
11. 9025793 - Audio signal processing circuit (2015-05-05),
12. 8611561 - First stage audio amplifier with clamping circuit (2013-12-17),
13. 8325946 - Input selector (2012-12-04),
14. 8254597 - Audio signal processing circuit (2012-08-28),
15. 8180072 - Electronic volume device (2012-05-15),

Title: Mitsuteru Sakai: Innovator in Audio Circuit Technology

Introduction

Mitsuteru Sakai is a prominent inventor based in Kyoto, Japan. He has made significant contributions to the field of audio circuit technology, holding a total of 16 patents. His innovative work has paved the way for advancements in audio amplification and digital-to-analog conversion.

Latest Patents

Sakai's latest patents include an audio circuit and a D/A converter. The audio circuit is a class D amplifier that receives an analog audio signal with a first reference voltage as its center level. It outputs an output pulse signal with a duty cycle corresponding to the analog audio signal. A bias circuit generates a second reference voltage, which is derived from the first reference voltage and the power supply voltage. Additionally, a periodic voltage generating circuit produces a periodic voltage with a triangle or sawtooth waveform, corresponding to the second reference voltage. The D/A converter features a high-order converter that generates first and second high-order voltages that change monotonously with opposite polarities concerning high-order bits of the digital signal. A low-order converter generates first and second low-order voltages that also change with opposite polarities concerning low-order bits of the digital signal. This innovative design allows for the output of differential analog signals through amplifiers that share a common configuration.

Career Highlights

Mitsuteru Sakai is currently employed at Rohm Co., Ltd., where he continues to develop cutting-edge technologies in audio circuits. His work has been instrumental in enhancing the performance and efficiency of audio devices.

Collaborations

Sakai collaborates with talented coworkers, including Yosuke Sato and Moto Yamada. Together, they contribute to the innovative projects at Rohm Co., Ltd., pushing the boundaries of audio technology.

Conclusion

Mitsuteru Sakai's contributions to audio circuit technology exemplify his dedication to innovation. His patents reflect a deep understanding of electronic engineering and a commitment to advancing the field. His work continues to influence the development of audio technologies, making a lasting impact on the industry.

Profile summary based on public USPTO records.
Data Sources: USPTO Patent Grant XML, Patent Center, EPO & CIPO • Normalized by IDiyas Innovation Graph. Methodology & provenance architecturePlease report any incorrect information to [email protected]
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