Parham Khajeh Hesamaddin

Title: Parham Khajeh Hesamaddin: Innovator in Phase-Locked Loop Technology

Introduction

Parham Khajeh Hesamaddin is a notable inventor based in Irvine, CA, with a focus on advanced electronic systems. He holds 3 patents that showcase his expertise in phase-locked loop technology and clock data recovery circuits. His innovative contributions have significant implications in the field of electronics and signal processing.

Latest Patents

One of his latest patents is titled "Phase Locked Loop Using Adaptive Filter Tuning for Radiation Hardening." This invention involves a phase-locked loop that includes a phase error detector, an event detector, a loop filter, and an oscillator. The phase error detector receives an input signal and a feedback signal to output a phase error signal. The event detector identifies a loss of lock condition based on this phase error signal. The loop filter processes the phase error signal to generate a filtered control signal, adapting its parameters based on the lock condition. The oscillator then outputs a signal with a phase determined by this filtered control signal.

Another significant patent is the "Clock Data Recovery Circuit." This circuit features a bit stream data rate divider and a digital phase-locked loop with a linear phase detector. The bit stream data rate divider reduces the frequency of a serial data stream, while the linear phase detector compares the phases of the divided data stream and a feedback signal. The digital phase-locked loop produces a clock signal based on the digital difference between the derived UP and DOWN signals, enhancing the reliability of data recovery.

Career Highlights

Parham has worked with prominent companies such as The Boeing Company and Skyworks Solutions, Inc. His experience in these organizations has allowed him to develop and refine his innovative ideas in electronic systems.

Collaborations

Throughout his career, Parham has collaborated with talented individuals, including Alfio Zanchi and Lothar Musiol. These partnerships have contributed to the advancement of his projects and innovations.

Conclusion

Parham Khajeh Hesamaddin is a distinguished inventor whose work in phase-locked loop technology and clock data recovery circuits has made a significant impact in the electronics field. His patents reflect a commitment to innovation and excellence in engineering.