Kuniaki Morita

Title: Kuniaki Morita: Innovator in Digital Signal Processing

Introduction

Kuniaki Morita is a notable inventor based in Hamamatsu, Japan. He has made significant contributions to the field of digital signal processing, particularly in the development of digital-to-analog converters. With a total of 3 patents to his name, Morita's work has had a substantial impact on audio technology.

Latest Patents

One of Morita's latest patents is a digital-to-analog converter with delta-sigma modulation. This innovative apparatus converts digital inputs into corresponding analog outputs. It features a digital filter that oversamples the digital input, which is represented in multiple bits. The delta-sigma modulator reduces the number of bits for requantizing the oversampled 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 design 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 significant invention by Morita is a mixer circuit that effectively mixes multiple input signals. This circuit includes several input terminals for receiving signals, first resistors for input resistance, and amplifiers for processing the signals. The output signal is generated from the output terminal of the first amplifier, showcasing Morita's expertise in creating efficient audio mixing solutions.

Career Highlights

Kuniaki Morita is currently employed at Yamaha Corporation, a leading company in the music and audio equipment industry. His work at Yamaha has allowed him to explore and develop innovative technologies that enhance audio quality and performance.

Collaborations

Morita has collaborated with several talented individuals in his field, including Takayuki Kohdaka and Mituhiro Homme. These collaborations have contributed to the advancement of technology in digital signal processing.

Conclusion

Kuniaki Morita is a distinguished inventor whose work in digital signal processing has led to significant advancements in audio technology. His innovative patents and contributions to Yamaha Corporation highlight his expertise and dedication to improving audio quality.