Katsuhiro Ohba

Title: Katsuhiro Ohba: Innovator in Angle Modulation Technology

Introduction

Katsuhiro Ohba is a notable inventor based in Yokohama, Japan. He has made significant contributions to the field of angle modulation technology, holding a total of 3 patents. His work has been instrumental in advancing systems that demodulate angle-modulated waves.

Latest Patents

One of Ohba's latest patents is an angle modulated wave demodulation system. This system demodulates an input angle modulated wave using a phase locked loop system, which includes a phase comparator that operates in response to the input wave. A voltage-controlled oscillator is connected to the output of the phase comparator, controlling its oscillation frequency. The system is designed to optimize the lock frequency range, which narrows when the input wave level falls below a predetermined threshold. This innovative approach allows the voltage-controlled oscillator to maintain its frequency at the center frequency of the carrier wave when the phase locked loop becomes unlocked.

Another significant patent is a multichannel record disc reproducing system. This system consists of at least two phase-locked loops, each equipped with a phase comparator and a voltage-controlled oscillator. These components work together to demodulate an angle-modulated signal that is separated from a signal picked up from a multichannel record disc. The system effectively combines the demodulated output signals while excluding noise and distortion through the use of different lock ranges.

Career Highlights

Katsuhiro Ohba is associated with the Victor Company of Japan, Limited, where he has contributed to various innovative projects. His expertise in angle modulation technology has positioned him as a key figure in the development of advanced demodulation systems.

Collaborations

Ohba has collaborated with notable coworkers such as Nobuaki Takahashi and Masaaki Satoh. Their combined efforts have led to significant advancements in the field of audio technology.

Conclusion

Katsuhiro Ohba's contributions to angle modulation technology through his patents and collaborations have made a lasting impact in the industry. His innovative systems continue to influence the development of audio and communication technologies.