Shouji Abou

Title: Shouji Abou: Innovator in Voltage Controlled Oscillators

Introduction

Shouji Abou is a notable inventor based in Kawasaki, Japan, recognized for his contributions to the field of electronics, particularly in the development of voltage controlled oscillators. With a total of six patents to his name, Abou has made significant advancements that enhance the functionality and reliability of electronic devices.

Latest Patents

Abou's latest patents include innovative designs for voltage controlled oscillators. One of his patents describes a voltage controlled oscillator using flip-flop controlled switching. In this design, an input MOS transistor receives an input voltage and produces a current that corresponds to this voltage. A charge/discharge circuit alternates the charging of a capacitor in two different directions based on the output current of the transistor. A select circuit then alternates between the potentials at either electrode of the capacitor. The system utilizes a single two-input comparator to compare a reference potential with the output signal of the select circuit, allowing for the generation of an oscillating signal through a flip-flop mechanism.

Another significant patent by Abou is a voltage controlled oscillator that maintains frequency independence from manufacturing process variations. This oscillator includes at least one capacitor and receives two input voltages. It charges the capacitor with a current corresponding to the first input voltage, oscillating at a frequency determined by both input voltages. To mitigate the adverse effects of process parameter changes during manufacturing, a second capacitor is charged for a predetermined period, and a sample/hold circuit captures the voltage across it. An operational amplifier then adjusts the first voltage to ensure the output signal matches a reference voltage, effectively stabilizing the oscillating frequency.

Career Highlights

Throughout his career, Shouji Abou has worked with prominent companies such as Toshiba Corporation and Tokyo Shibaura Electric Co., Ltd. His experience in these organizations has contributed to his expertise in electronic innovations and patent development.

Collaborations

Abou has collaborated with notable colleagues, including Itsuo Sasaki and Keiko Chikaoka, who have also made significant contributions to the field of electronics.

Conclusion

Shouji Abou's work in voltage controlled oscillators showcases his innovative spirit and dedication to advancing electronic technology. His patents reflect a deep understanding of the complexities involved in electronic design, making him a valuable contributor to the industry.