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For the Inventor, By the Inventor

Chiba, Japan

Hirokazu Yoshizawa

This inventor holds 9 USPTO granted patents. Top assignees: Seiko Instruments Inc, Gakkouhoujin Chikoujigakuen. Active years: 1999-2009.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Hirokazu Yoshizawa. Retrieved from https://idiyas.com/inventor/hirokazu-yoshizawa

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

USPTO Granted Patents = 9

% Patents Active = 77.8

Average Co-Inventor Count = 1.5

ph-index = 4

Forward Citations = 41(Granted Patents)


Location History:

  • Tokyo, JP (1999 - 2000)
  • Chiba, JP (2001 - 2004)
  • Fukaya, JP (2009)

Company Filing History:

goldMedal9 out of 2,903 
 
Seiko Instruments Inc
 patents
silverMedal2 out of 2 
 
Gakkouhoujin Chikoujigakuen
 patents
where one patent can have more than one assignee

Years Active: 1999-2009

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9 patents (USPTO):Explore Patents
1. 7508258 - Amplifier circuit (2009-03-24),
2. 7479826 - Chopper amplifier circuit and semiconductor device (2009-01-20),
3. 6713815 - Semiconductor device with transistors that convert a voltage difference into a drain current difference (2004-03-30),
4. 6542007 - Inverter circuit (2003-04-01),
5. 6437722 - AD converter circuit (2002-08-20),
6. 6351163 - Reset circuit (2002-02-26),
7. 6288662 - A/D converter circuit having ladder resistor network with alternating first and second resistors of different resistance values (2001-09-11),
8. 6037836 - Switched-capacitor amplifier circuit (2000-03-14),
9. 5982247 - CR oscillating circuit (1999-11-09),

Title: Hirokazu Yoshizawa: Innovator in Amplifier Circuit Technology

Introduction

Hirokazu Yoshizawa is a prominent inventor based in Chiba, Japan. He has made significant contributions to the field of amplifier circuit technology, holding a total of 9 patents. His innovative designs focus on enhancing the performance and efficiency of electronic circuits.

Latest Patents

Yoshizawa's latest patents include a chopper amplifier circuit designed to eliminate the influence of an amplifier's slew rate and suppress spike generation. This invention aims to produce an output signal with minimal harmonic distortion. The chopper amplifier circuit features a first chopper circuit that modulates the input signal using two pulses that are phase-shifted. It also includes an amplifier that enhances the modulated signal and two sample hold circuits that manage the timing of the output. Another notable patent involves a chopper amplifier circuit that reduces the offset voltage of a sensor bridge and its temperature characteristics. This invention incorporates an offset adjusting voltage generation circuit and an offset temperature characteristics adjusting voltage generation circuit, which work together to improve sensor performance.

Career Highlights

Throughout his career, Yoshizawa has worked with notable companies such as Seiko Instruments Inc. and Gakkouhoujin Chikoujigakuen. His experience in these organizations has contributed to his expertise in developing advanced electronic solutions.

Collaborations

Yoshizawa has collaborated with talented individuals in the field, including Ryoichi Anzai and Toshiyuki Uchida. These partnerships have fostered innovation and the exchange of ideas, further enhancing his contributions to technology.

Conclusion

Hirokazu Yoshizawa's work in amplifier circuit technology showcases his dedication to innovation and excellence. His patents reflect a deep understanding of electronic systems and a commitment to improving their functionality.

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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