Tetsuo Hirano

Title: Tetsuo Hirano: Innovator in Differential Amplifier and Switched Capacitor Circuits

Introduction

Tetsuo Hirano is a notable inventor based in Anjo, Japan. He has made significant contributions to the field of electronics, particularly in the development of differential amplifier circuits and switched capacitor circuits. With a total of 3 patents to his name, Hirano continues to push the boundaries of innovation in his field.

Latest Patents

Hirano's latest patents showcase his expertise and innovative thinking. One of his notable inventions is a differential amplifier circuit that utilizes low noise input transistors. This circuit is designed to minimize internal transistor noise components without increasing costs when used in a CMOS operational amplifier. The design includes a differential input stage circuit where the gate lengths of load transistors and differential input transistors are optimally ratioed to achieve noise reduction.

Another significant patent is his switched capacitor circuit, which comprises a capacitor, a MOS switch, and a timing generating circuit. The MOS switch is connected in series with the capacitor to discharge electric charges. It features multiple MOS transistors that are parallelly connected, allowing for efficient operation. The timing generating circuit produces timing signals that sequentially activate the MOS transistors, reducing sampling noise due to the transiently high ON-state resistance of the MOS switch.

Career Highlights

Hirano's career is marked by his dedication to advancing electronic circuit design. His work has been instrumental in enhancing the performance and efficiency of various electronic devices. He is currently employed at Nippondenso Co., Ltd., where he continues to innovate and contribute to the field.

Collaborations

Throughout his career, Hirano has collaborated with talented individuals such as Hiroaki Tanaka and Ryuichirou Abe. These collaborations have fostered a creative environment that encourages the exchange of ideas and the development of groundbreaking technologies.

Conclusion

Tetsuo Hirano is a distinguished inventor whose work in differential amplifier and switched capacitor circuits has made a significant impact in the electronics industry. His innovative patents reflect his commitment to excellence and his ability to solve complex engineering challenges. His contributions will undoubtedly continue to influence the field for years to come.