Hiromi Katoh

Title: Hiromi Katoh: Innovator in Differential Amplifiers and Crystal Oscillators

Introduction

Hiromi Katoh is a notable inventor based in Atsugi, Japan. He has made significant contributions to the field of electronics, particularly in the development of differential amplifiers and crystal oscillators. With a total of 3 patents to his name, Katoh continues to push the boundaries of innovation in his industry.

Latest Patents

One of his latest inventions is a differential amplifier device. This device produces a collector current of an output side transistor as an output current signal. In this case, a power supply voltage or a voltage closer to the power supply voltage is supplied to the collector terminal of the output side transistor. First and second current mirror circuits produce a current signal in response to the output current signal. The produced current signal passes through a resistor, a terminal of which is connected to a reference voltage. When the produced current signal passes through the resistor, a voltage drop from the reference voltage occurs at the resistor. By utilizing the voltage drop at the resistor, an output voltage changing in response to two output voltage signals is produced.

Another significant patent is a crystal oscillator with a temperature-compensating analog circuit. This temperature-compensated quartz oscillator comprises a stabilized power supply circuit for supplying a constant voltage, an oscillation circuit that includes a quartz resonator and a varicap, a temperature detecting circuit that produces a detected voltage signal corresponding to the oscillator part temperature, and a temperature characteristic compensating portion that generates a varicap control voltage signal through analog processing of the detected voltage signal.

Career Highlights

Hiromi Katoh is currently employed at Mitsumi Electric Company Ltd., where he continues to innovate and develop new technologies. His work has been instrumental in advancing electronic components that are essential in various applications.

Collaborations

Katoh collaborates with Shigemitsu Watanabe, a talented woman in the field, contributing to the success of their projects and innovations.

Conclusion

Hiromi Katoh's contributions to the fields of differential amplifiers and crystal oscillators highlight his role as a significant inventor in the electronics industry. His innovative spirit and dedication to research continue to inspire advancements in technology.