Company Filing History:
Years Active: 2005-2009
Title: Youngho Ahn: Innovator in Phase-Locked Loop Technology
Introduction
Youngho Ahn is a prominent inventor based in Seoul, South Korea. He has made significant contributions to the field of electronics, particularly in the development of phase-locked loop (PLL) technology. With a total of 2 patents, Ahn's work focuses on enhancing the performance and efficiency of frequency generators.
Latest Patents
One of Ahn's latest patents is a "Sigma-delta based phase lock loop." This innovative device includes a phase frequency detector (PFD), a charge pump, and a voltage-controlled oscillator. The PFD receives a reference signal and a feedback signal, outputting signals based on their comparison. The charge pump outputs a charge based on the PFD's output signals, utilizing both a fixed current source and a variable current source. The voltage-controlled oscillator then generates a clock signal based on the charge received from the charge pump.
Another notable patent is the "System and method for suppressing noise in a phase-locked loop circuit." This invention aims to improve the signal-to-noise ratio of frequency generators by suppressing phase noise and noise from mismatches in internal circuits. A modulation scheme is employed to shift spurious noise signals outside the loop bandwidth, allowing for their removal or reduction through filtering. This approach significantly enhances the signal-to-noise ratio while achieving faster lock times.
Career Highlights
Youngho Ahn is currently associated with GCT Semiconductor, Inc., where he continues to innovate in the field of semiconductor technology. His work has been instrumental in advancing PLL technology, making it more efficient and reliable for various applications.
Collaborations
Ahn collaborates with talented individuals such as Eunseok Song and Yido Koo, contributing to a dynamic work environment that fosters innovation and creativity.
Conclusion
Youngho Ahn's contributions to phase-locked loop technology and his innovative patents highlight his role as a leading inventor in the electronics field. His work continues to influence advancements in frequency generation and noise suppression techniques.