Hiroshi Miyagi

Title: Innovations of Hiroshi Miyagi

Introduction

Hiroshi Miyagi is a notable inventor based in Yokohama, Japan. He has made significant contributions to the field of electronics, particularly in the development of smoothing circuits and frequency synthesizers. With a total of 2 patents, his work showcases innovative solutions that enhance circuit performance and efficiency.

Latest Patents

Miyagi's latest patents include a smoothing circuit that employs a charging circuit which intermittently charges when the input voltage is higher than the terminal voltage. This circuit also features a discharging circuit that intermittently releases discharging current when the terminal voltage exceeds the input voltage. The design aims to miniaturize circuits while increasing integration scale, allowing for easy variation of attack and release times. The components of this smoothing circuit include a capacitor, a voltage comparator, a charging circuit, and a discharging circuit. The voltage comparator plays a crucial role by comparing the terminal voltage of the capacitor with its input voltage, thereby actuating the appropriate circuit based on the comparison result.

Another significant patent is a frequency synthesizer that includes a phase detector for comparing a reference frequency with a feedback frequency. This synthesizer features a filter connected to the phase detector, a voltage-controlled oscillator, and a multistage frequency converter. The multistage frequency converter is designed to receive the oscillator signal and perform non-integer division, allowing for arbitrary and fine adjustment of the division ratio. This innovation ensures that the feedback frequency remains constant and higher, regardless of the output frequency, thus significantly reducing acquisition time.

Career Highlights

Throughout his career, Hiroshi Miyagi has worked with various companies, including Shintom Co., Ltd. His experience in the industry has allowed him to develop and refine his inventions, contributing to advancements in electronic circuit design.

Collaborations

Miyagi has collaborated with notable individuals such as Shinsaku Mori and Duk-Kyu Park. These partnerships have likely fostered a creative environment that encourages innovation and the sharing of ideas.

Conclusion

Hiroshi Miyagi's contributions to the field of electronics through his patents reflect his dedication to innovation and improvement in circuit design. His work continues to influence the industry and inspire future inventors.