Company Filing History:
2 out of 52,766 
1 out of 7 
1 out of 4 Years Active: 1986
Title: Nana Shigematsu: Pioneering Innovations in Differential Amplifier Technology
Introduction
Nana Shigematsu is an accomplished inventor hailing from Yokohama, Japan. With a remarkable portfolio that includes two patents, Shigematsu has made significant contributions to the field of electrical engineering. Her work particularly focuses on differential amplifier and composite transistor circuits, showcasing her innovative spirit and technical expertise.
Latest Patents
Shigematsu’s latest patents include a **Differential Amplifier** and a **Composite Transistor Circuit**. The Differential Amplifier features first and second current mirror circuits designed for amplifying transistors. The architecture includes output current paths that comprise output current terminals and intricately connects reference input current paths to the collectors of the transistors. The first current mirror circuit utilizes third and fourth transistors, while the second employs fifth and sixth transistors, all presumably ensuring improved amplification performance.
Another noteworthy invention is the Composite Transistor Circuit, which incorporates a first current mirror circuit connected in series with an input transistor collector. In this innovative design, a second current mirror circuit plays a pivotal role in managing the output current from the first mirror circuit, further connected to the emitter of the input transistor, enhancing the functionality and adaptability of electronic systems.
Career Highlights
In her impressive career, Nana Shigematsu has collaborated with notable organizations such as Kabushiki Kaisha Toshiba and Tosbac Computer System Company Limited. These experiences provided her with a robust platform to develop her inventive skills and contribute to cutting-edge technologies in the industry.
Collaborations
Throughout her career, Shigematsu has worked alongside talented colleagues including Tatsuo Tanaka and Kazushige Koshika. These collaborations reflect her ability to engage with and learn from other professionals in the field, fostering a culture of innovation and teamwork.
Conclusion
Nana Shigematsu continues to be an influential figure in the domain of electrical engineering, particularly through her innovative approaches to differential amplifiers and composite circuits. Her contributions not only highlight her expertise but also play an essential role in advancing technology in her industry. As an inventor, Shigematsu's work serves as an inspiration for aspiring engineers and innovators looking to make their mark on the world.