Location History:
- Kanagawa, JP (1988)
- Yokohama, JP (1988 - 1992)
Company Filing History:
2 out of 5,290 
1 out of 16 Years Active: 1988-1992
Title: Inventor Spotlight: Sadayuki Nishiki from Yokohama, JP
Introduction
Sadayuki Nishiki is a prolific inventor hailing from Yokohama, Japan. With a remarkable count of three patents to his name, Nishiki has made significant contributions to the field of high-frequency amplification and signal processing.
Latest Patents
Among his recent innovations, Nishiki's first notable patent is the "Impedance-matched, class F high-frequency amplifier." This advancement incorporates an input matching circuit connected to the gate of a field-effect transistor (FET). The design features an output matching circuit that effectively matches both the fundamental frequency and the second harmonic frequency, thereby enhancing performance. The clever use of an even harmonic terminating circuit ensures that the output impedance's stray reactance is offset, leading to more accurate termination of the second harmonic frequencies.
Another of Nishiki's key patents is for a "Repeater for a same frequency with spillover measurement." This innovative system is designed to measure the spillover signal from a transmitter to a receiver in a same frequency repeater or booster. Through a careful frequency conversion device, the transmission frequency is slightly offset, allowing for precise detection and measurement of the offset frequency component in the reception signal. This intelligent design maximizes the repeater's gain while preventing oscillation, demonstrating Nishiki's expertise in signal processing.
Career Highlights
Throughout his career, Sadayuki Nishiki has worked with renowned organizations like Nippon Telegraph and Telephone Corporation and Nippon Telegraph & Telephone Co. His commitment to advancing technology has established him as a respected figure in the telecommunications field.
Collaborations
Nishiki has collaborated with notable colleagues, including Toshio Nojima and Hitoshi Odate. These partnerships have likely influenced his work and contributed to the successful development of his patented technologies.
Conclusion
Sadayuki Nishiki continues to be a key player in the realm of telecommunications, showcasing his innovative spirit through his patents. His contributions to high-frequency amplification and signal measurement are invaluable, reflecting his dedication to enhancing technology and communication systems.