Location History:
- Itami, JP (1992 - 1996)
- Hyogo, JP (2001)
- Tokyo, JP (1997 - 2009)
Company Filing History:
6 out of 21,351 
2 out of 15,844 
Years Active: 1992-2009
Title: Kosei Maemura: Innovator in Power Amplifier Technology
Introduction
Kosei Maemura is a prominent inventor based in Tokyo, Japan. He has made significant contributions to the field of power amplifier technology, holding a total of 8 patents. His innovative designs have advanced the efficiency and performance of amplifiers in various applications.
Latest Patents
One of Maemura's latest patents is a power amplifier circuit that enhances the operation of amplifiers. In this design, first and second amplifier circuits amplify an input signal, while a distribution circuit adjusts the power supplied to the first amplifier circuit. This ensures that the input power and output power remain proportional. Additionally, in a linear operation, the power from the first amplifier circuit is compared with that from the second amplifier circuit. The comparison circuit then adjusts the gain or saturated power of the second amplifier circuit based on the differences in signals, maintaining proportionality between input and output power.
Another notable patent is a bias circuit for power amplifiers that minimizes distortion characteristics. This combined bias circuit features both voltage drive and current drive bias circuits in parallel. A linearizer, including a first resistor, is connected between an amplifying transistor and a second resistor. This configuration allows for consistent amplifying operations even with low external reference voltages, while also limiting degradation in distortion characteristics during low-temperature operations.
Career Highlights
Kosei Maemura has worked with several esteemed companies throughout his career. He has been associated with Mitsubishi Electric Corporation and Mitsubishi Denki Kabushiki Kaisha, where he has contributed to various innovative projects. His work has been instrumental in advancing the technology used in power amplifiers.
Collaborations
Maemura has collaborated with notable professionals in his field, including Kazuya Yamamoto and Takao Moriwaki. These collaborations have further enriched his work and contributed to the development of cutting-edge technologies in power amplification.
Conclusion
Kosei Maemura's contributions to power amplifier technology are significant and impactful. His innovative patents and collaborations highlight his expertise and dedication to advancing this field. His work continues to influence the design and efficiency of amplifiers in various applications.
Inventor’s Patent Attorneys refers to legal professionals with specialized expertise in representing inventors throughout the patent process. These attorneys assist inventors in navigating the complexities of patent law, including filing patent applications, conducting patent searches, and protecting intellectual property rights. They play a crucial role in helping inventors secure patents for their innovative creations.