Mituhiro Homme

Title: Mituhiro Homme: Innovator in Digital-to-Analog Conversion Technology

Introduction

Mituhiro Homme is a notable inventor based in Hamamatsu, Japan. He has made significant contributions to the field of digital-to-analog conversion technology. With a total of 2 patents to his name, Homme's work has advanced the capabilities of electronic devices in processing digital signals.

Latest Patents

Homme's latest patents include a digital-to-analog converter with delta-sigma modulation. This innovative apparatus operates to convert a digital input into a corresponding analog output. It features a digital filter that oversamples the digital input, which is represented in multiple bits. A delta-sigma modulator is employed to effect delta-sigma modulation of the oversampled digital input, thereby reducing the number of bits for requantizing the input while maintaining a certain signal-to-noise ratio (S/N ratio). Additionally, a low-pass filter converts the requantized digital input into an analog output. The invention also includes a level detecting circuit that detects when the digital input falls below a predetermined level, along with a shifting circuit that increases the digital input value to improve the S/N ratio. An attenuator is also included to compensate for the increased value while maintaining the improved S/N ratio.

Another patent by Homme involves a digital-to-analog converter that operates in synchronization with a system clock signal. This converter oversamples and delta-sigma-modulates a digital input to produce a requantized digital signal. The system clock signal is mixed with noise due to the oversampling and delta-sigma modulation. To address this, the clock signal is frequency-divided to produce a longer period divided clock signal that is free of noise. The requantized digital signal is detected at each long period and pulse-modulated to generate a pulse signal, which is then low-pass-filtered to produce an analog output with an improved S/N ratio.

Career Highlights

Mituhiro Homme is currently employed at Yamaha Corporation, where he continues to innovate in the field of digital signal processing. His work has been instrumental in enhancing the performance of audio and electronic devices.

Collaborations

Homme has collaborated with notable colleagues, including Takayuki Kohdaka and Masamitu Hirano, contributing to various projects that push the boundaries of technology.

Conclusion

Mituhiro Homme's contributions