Takehiro Akiyama

Title: Takehiro Akiyama: Innovator in PLL Frequency Synthesizers

Introduction

Takehiro Akiyama is a prominent inventor based in Kasugai, Japan. He has made significant contributions to the field of electronics, particularly in the development of phase-locked loop (PLL) frequency synthesizers. With a total of 11 patents to his name, Akiyama's work has had a lasting impact on the industry.

Latest Patents

One of Akiyama's latest patents involves charge pump circuits for PLL frequency synthesizers. This invention includes a voltage-controlled oscillator and a comparison frequency divider that divides the output signal from the oscillator to generate a comparison signal. The phase comparator in the synthesizer compares the phase of a reference signal with that of the comparison signal, producing first and second phase difference signals. The charge-pump circuit operates based on these signals and is connected to the voltage-controlled oscillator. Akiyama's design incorporates bipolar transistors and CMOS transistors to enhance the performance of the charge-pump circuit.

Career Highlights

Throughout his career, Akiyama has worked with notable companies such as Fujitsu Corporation and Fujitsu VLSI Limited. His experience in these organizations has allowed him to refine his skills and contribute to groundbreaking technologies in the field of electronics.

Collaborations

Akiyama has collaborated with esteemed colleagues, including Hirokazu Suzuki and Shinji Saito. These partnerships have fostered innovation and have been instrumental in the development of advanced electronic solutions.

Conclusion

Takehiro Akiyama's contributions to PLL frequency synthesizers and his extensive patent portfolio highlight his role as a leading inventor in the electronics industry. His work continues to influence the field and inspire future innovations.