Yutaka Kojima

Title: Yutaka Kojima: Innovator in Amplitude Modulation Technology

Introduction

Yutaka Kojima is a prominent inventor based in Tokyo, Japan. He has made significant contributions to the field of amplitude modulation technology, holding a total of 12 patents. His innovative work has advanced the capabilities of audio broadcasting systems.

Latest Patents

Kojima's latest patents include an amplitude modulation circuit and method. This invention features a predetermined number of drivers and differentially switched power amplifiers arranged in pairs. A program sound signal, quantized into a specific number of bits, is divided through a ROM into multiple bit groups. Each driver selects two different phase-shift carriers based on the distributed bit group, allowing for efficient amplitude modulation. Another notable patent is an amplitude modulation method and broadcasting apparatus. This system converts an input analog signal into a digital form, controlling the gain of an analog controlled amplifier while selectively turning on digitally controlled amplifiers. This dual approach provides both rough and fine amplitude constituents for improved audio quality.

Career Highlights

Throughout his career, Yutaka Kojima has worked with notable companies such as Jujo Paper Co., Ltd. and Japan Radio Co., Ltd. His experience in these organizations has contributed to his expertise in audio technology and innovation.

Collaborations

Kojima has collaborated with talented individuals in the field, including Hiroyo Oshima and Takashi Omori. These partnerships have fostered a creative environment that has led to groundbreaking advancements in amplitude modulation.

Conclusion

Yutaka Kojima's contributions to amplitude modulation technology have significantly impacted the audio broadcasting industry. His innovative patents and collaborations highlight his dedication to advancing this field.