Location History:
- Yokohama, JA (1976)
- Katsuta, JP (1978 - 1983)
Company Filing History:
Years Active: 1976-1983
Title: Innovations of Kouichi Tomatsuri
Introduction
Kouichi Tomatsuri is a notable inventor based in Katsuta, Japan. He has made significant contributions to the field of audio technology, particularly in the development of tape recorders and gain control circuits. With a total of 4 patents to his name, Tomatsuri's work reflects a deep understanding of electronic engineering and sound recording.
Latest Patents
One of his latest patents is a tape recorder that features a variable gain circuit. This circuit compensates for the sound recording sensitivity of magnetic tape and includes two variable equalizers that adjust the frequency characteristics in the intermediate and high-frequency ranges. The design allows for reference signals at three different frequencies to be recorded and subsequently reproduced, optimizing the gain and frequency compensation.
Another significant patent is a gain control circuit that utilizes a pair of transistors forming a differential amplifier. This circuit includes resistors connected to a common regulated current supply, which helps manage fluctuations in the diffused resistance of diodes used as a load. Additionally, variable resistors are incorporated to compensate for variations in the base-emitter voltage of the transistors, enhancing the circuit's reliability.
Career Highlights
Kouichi Tomatsuri is currently employed at Hitachi, Ltd., where he continues to innovate in the field of audio technology. His work has contributed to advancements in sound recording and playback systems, making them more efficient and effective.
Collaborations
Throughout his career, Tomatsuri has collaborated with esteemed colleagues such as Shigeru Okada and Takao Arai. These partnerships have fostered a creative environment that has led to the development of groundbreaking technologies in audio engineering.
Conclusion
Kouichi Tomatsuri's contributions to audio technology through his innovative patents demonstrate his expertise and commitment to advancing the field. His work at Hitachi, Ltd. and collaborations with other professionals highlight the importance of teamwork in driving technological progress.