Masamitu Hirano

Title: Masamitu Hirano: Innovator in Digital-to-Analog Conversion Technology

Introduction

Masamitu Hirano 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, Hirano's work focuses on enhancing the performance and efficiency of digital signal processing.

Latest Patents

Hirano'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 is utilized to convert 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 then used to compensate for the increased value while maintaining the improved S/N ratio, resulting in an accurate analog output.

Career Highlights

Hirano is currently employed at Yamaha Corporation, where he continues to innovate in the field of digital signal processing. His work has been instrumental in advancing the technology used in various audio and electronic devices.

Collaborations

Hirano has collaborated with notable coworkers, including Takayuki Kohdaka and Mituhiro Homme. Their combined expertise has contributed to the successful development of advanced technologies in their field.

Conclusion

Masamitu Hirano's contributions to digital-to-analog conversion technology exemplify his innovative spirit and dedication to improving electronic systems. His patents reflect a commitment to enhancing the quality of digital audio and signal processing.