Manabu Hirata

Title: Manabu Hirata: Innovator in Circuit Design

Introduction

Manabu Hirata is a notable inventor based in Tokyo, Japan. He has made significant contributions to the field of electronics, particularly in circuit design. With a total of 2 patents to his name, Hirata continues to push the boundaries of innovation in his industry.

Latest Patents

Hirata's latest patents include a peak-hold circuit and a voltage-controlled oscillator. The peak-hold circuit features a differential amplifier with first and second transistors as a differential pair. The first transistor receives an input signal at its gate, while a third transistor is connected between a first power supply and an output node. This output node connects to the gate of the second transistor, with the connectivity of the third transistor controlled by the output of the differential amplifier. A capacitor holds a peak voltage, connected between the output node and a second power supply, along with a resistor for discharging, which is connected in parallel to the capacitor. Additionally, a fourth transistor is connected to the first transistor in parallel, receiving a reference voltage at its gate to limit the voltage.

The voltage-controlled oscillator operates at a frequency corresponding to a control voltage. It includes a voltage-current converter circuit that converts the control voltage to a control current. This current flows through a ring oscillator, which oscillates at a frequency corresponding to the current value. The voltage-current converter circuit also features a voltage-voltage converting circuit that inputs the control voltage and converts it to a control current, along with an offset current generating circuit that adds a constant current to the control current.

Career Highlights

Hirata is currently employed at Oki Semiconductor Co., Ltd., where he applies his expertise in circuit design. His work has been instrumental in developing innovative solutions that enhance electronic performance.

Collaborations

Throughout his career, Hirata has collaborated with notable colleagues, including Kazuyuki Tajima and Yoichi Fueki. These collaborations have fostered a creative environment that encourages the exchange of ideas and advancements in technology.

Conclusion

Manabu Hirata is a distinguished inventor whose work in circuit design has led to significant advancements in electronics. His contributions, particularly through his latest patents, demonstrate his commitment to innovation and excellence in the field.