Company Filing History:
Years Active: 1982
Title: Nobuyuki Sanpei: Innovator in Amplifier Technology
Introduction
Nobuyuki Sanpei is a prominent inventor based in Tokyo, Japan. He is known for his innovative contributions to amplifier technology, particularly in the design of bias circuits for power amplifiers. His work has significantly impacted the efficiency and performance of audio amplification systems.
Latest Patents
Sanpei holds a patent for a bias circuit for power amplifiers. This invention allows for class A or class AB operation while substantially reducing the idling current of the output transistors at low input signal levels. The bias circuit includes a DC current limiting circuit made up of transistors that connect the common output of the amplifier to the bases of the output transistors. This design effectively limits the idling currents of the output transistors when no input signal is applied. Additionally, the circuit features RC/diode components that adjust the bias voltages of the transistors in response to changes in the output voltage, ensuring that the idling currents follow the input signal power effectively.
Career Highlights
Nobuyuki Sanpei is associated with Trio Kabushiki Kaisha, where he has made significant contributions to the field of electronics. His innovative designs have enhanced the performance of various audio devices, making them more efficient and reliable.
Collaborations
Sanpei has worked alongside notable colleagues, including Isumi Shibata and Kazumasa Sakai. Their collaborative efforts have further advanced the development of amplifier technologies.
Conclusion
Nobuyuki Sanpei's contributions to amplifier technology through his innovative bias circuit patent demonstrate his expertise and commitment to enhancing audio performance. His work continues to influence the field, showcasing the importance of innovation in electronics.