Ken Yamamura

Title: Ken Yamamura: Innovator in Digital Amplification Technology

Introduction

Ken Yamamura is a notable inventor based in Sagamihara, Japan. He has made significant contributions to the field of digital amplification technology, holding two patents that showcase his innovative spirit and technical expertise.

Latest Patents

One of Ken's latest patents is a digital switching amplifier. This invention enhances the signal-to-noise (S/N) ratio during small signal output while reducing current consumption and electromagnetic interference (EMI). The digital switching amplifier features an integrator that integrates the input signal, a quantizer that quantizes the output signal of the integrator with varying resolutions for different predetermined signal regions, and a pulse width modulator that performs pulse width modulation for each quantized signal using different proportionality coefficients. Additionally, it includes a switching circuit that provides the load with electrical signals of varying values based on the pulse-width modulated signals and a feedback circuit that negatively feeds back the output of the quantizer to the input of the integrator.

Another significant patent is related to D/A converters, specifically a delta-sigma D/A converter. This invention further exemplifies Ken's commitment to advancing technology in the field of digital signal processing.

Career Highlights

Ken Yamamura is currently employed at Asahi Kasei Microsystems Co., Ltd., where he continues to innovate and develop cutting-edge technologies. His work has had a profound impact on the industry, particularly in enhancing the performance of digital amplifiers.

Collaborations

Throughout his career, Ken has collaborated with talented individuals such as Akihiro Ikehara and Naoko Hyodo. These collaborations have contributed to the successful development of his patents and innovations.

Conclusion

Ken Yamamura is a distinguished inventor whose work in digital amplification technology has led to significant advancements in the field. His patents reflect his dedication to improving technology and enhancing performance in electronic devices.