This inventor holds 1 USPTO granted patent. Top assignees: Alps Electric Co., Ltd., Hitachi, Ltd.. Active years: 1997.
Company Filing History:
1 out of 4,048 
1 out of 42,726 
Years Active: 1997
Title: Takefumi Endou: Innovator in Transistor Technology
Introduction
Takefumi Endou is a notable inventor based in Gunma, Japan. He has made significant contributions to the field of electronics, particularly in the development of transistor technology. His innovative work has led to the creation of a unique patent that addresses noise issues in electronic circuits.
Latest Patents
Takefumi Endou holds a patent for a grounded-base transistor amplifier. This invention includes a pair of transistors with their bases grounded at high frequency, and collectors coupled to a signal output terminal. The design features a high-frequency transformer with a primary winding connected to a signal input terminal and a secondary winding equipped with a midpoint tap. Both ends of the secondary winding are connected to the emitters of the transistors. Additionally, a constant-current circuit is connected to the midpoint tap of the secondary winding, producing a bias current flow through the transistors. This innovative design ensures that noise voltages generated by the constant-current circuit are supplied to the emitters of the transistors in the same phase, preventing noise voltage from appearing at the signal output terminal. Takefumi Endou's patent is a testament to his ingenuity and understanding of electronic systems, with 1 patent to his name.
Career Highlights
Throughout his career, Takefumi Endou has worked with prominent companies in the electronics industry. He has been associated with Alps Electric Co., Ltd. and Hitachi, Ltd., where he contributed to various projects and advancements in technology. His experience in these reputable organizations has helped him refine his skills and knowledge in the field.
Collaborations
Takefumi Endou has collaborated with notable colleagues, including Kazuo Watanabe and Mitsunari Okazaki. These partnerships have likely fostered an environment of innovation and creativity, leading to advancements in their respective projects.
Conclusion
Takefumi Endou is a distinguished inventor whose work in transistor technology has made a significant impact in the field of electronics. His patent for a grounded-base transistor amplifier showcases his innovative approach to solving technical challenges. Through his career and collaborations, he continues to contribute to advancements in technology.