Masako Arizumi

Title: Masako Arizumi: Innovator in Digital Amplification Technology

Introduction

Masako Arizumi is a prominent inventor based in Tokyo, Japan. She has made significant contributions to the field of digital amplification technology, holding a total of 3 patents. Her innovative work has paved the way for advancements in audio technology.

Latest Patents

One of her latest patents is a pulse width modulation digital amplifier. In this invention, a time controller generates first and second selection signals for outputting any one of music data, a center output, and a lowest output to a P output and an N output based on a power ON/OFF signal and a start/stop signal. Additionally, it generates a third selection signal for determining whether a signal having the same phase as that of the P output is output to the N output or a signal obtained by inverting the P output is output to the N output. A data selection circuit determines data to be output to the P output and the N output based on the first and second selection signals. An output data register circuit converts parallel data determined by the data selection circuit into serial data to output the serial data into the P output. An output selection circuit determines the N output based on the third selection signal.

Another notable patent is a PWM converting circuit, D/A converter, and PWM converting method with improved resolution. This circuit includes a pulse generator for generating two pulse signals for each bit of a basic clock pulse train, in response to the value of digital input data. A differential amplifier outputs a differential amplification component between the two pulse signals as a PWM signal. The pulse generator varies the pulse width of the first of the two pulse signals on a bit-by-bit basis, in response to the value of the digital input data, while holding a level of the second pulse signal throughout all bits of the basic clock pulse train.

Career Highlights

Masako has worked with notable companies such as Mitsubishi Electric Corporation and Renesas Technology Corporation. Her experience in these organizations has contributed to her expertise in digital amplification technologies.

Collaborations

Masako has collaborated with various professionals in her field, including her coworker Hiroyuki Harada. Their joint efforts have led to advancements in the technologies they have developed.

Conclusion

Masako Arizumi is a trailblazer in the realm of digital amplification technology. Her innovative patents and