Location History:
- Sagamihara, JP (1984)
- Atsugi, JP (1984)
- Tokyo, JP (1979 - 1987)
Company Filing History:
Years Active: 1979-1987
Title: The Innovative Contributions of Takeo Ohba
Introduction
Takeo Ohba is a notable inventor based in Sagamihara, Japan. He has made significant contributions to the field of technology, particularly in the areas of motor control and magnetic recording systems. With a total of 6 patents to his name, Ohba's work has had a lasting impact on various technological advancements.
Latest Patents
One of Ohba's latest patents is a control circuit for driving a step motor. This invention features a control circuit that manages at least first and second phase coils, each equipped with corresponding phase control elements. A memory component stores phase switching data and connects to the phase control elements. A first counter supplies phase switching data addresses to the memory, identifying the coil or coils and their respective phases to be driven in response to step driving pulses. Additionally, a second counter provides data addresses to control the ON/OFF state of the phase switching data, thereby regulating the phase current value. An oscillator drives the second counter at a frequency that exceeds the frequency of the step driving pulses.
Another significant patent by Ohba is a tracking control system for a magnetic recording and reproducing system. This apparatus is designed to simultaneously reproduce video signals that include block synchronization signals, recorded in successive, parallel channel tracks on magnetic tape. The tracks are arranged obliquely, with adjacent tracks containing video signals recorded at different azimuth angles. The system includes two magnetic heads that move along the channel tracks to reproduce the recorded signals. A phase detecting circuit identifies phase errors between the block synchronization signals reproduced from adjacent tracks, while a control circuit adjusts the relative positions of the tracks and magnetic heads based on the detected phase error, ensuring accurate scanning of the tracks.
Career Highlights
Throughout his career, Takeo Ohba has worked with prominent companies such as Sony Corporation and Mitsubishi Electric Corporation. His experience in these leading organizations has allowed him to refine his skills and contribute to groundbreaking technological advancements.
Collaborations
Ohba has collaborated with talented individuals in the field, including Hirohisa Koga and Ryusuke Moriya. These partnerships have fostered innovation and have been instrumental in the development of his patented technologies.
Conclusion
Takeo Ohba's contributions to technology through his patents and collaborations highlight his role as a significant inventor. His work continues to influence advancements in motor control and