This inventor holds 3 USPTO granted patents. Top assignees: Semiconductor Technology Academic Research Center, Gunma University. Active years: 2006-2009.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile
Location History:
- Gunma, JP (2006 - 2007)
- Isesaki, JP (2009)
Company Filing History:
2 out of 135 
1 out of 115 
Years Active: 2006-2009
Title: Hiroyuki Hagiwara: Innovator in High-Precision Modulation Technologies
Introduction
Hiroyuki Hagiwara is a notable inventor based in Gunma, Japan. He has made significant contributions to the field of modulation technologies, holding a total of 3 patents. His work focuses on high-precision devices that enhance signal processing and reduce noise.
Latest Patents
Hagiwara's latest patents include a high-precision multi-band pass modulator. This innovative modulator reduces nonlinear noise through the use of a multibit DAC, ensuring minimal hardware and power consumption. The digital signal is DA converted and fed back to a subtraction circuit that is supplied with an analog signal. The DAC utilized in this feedback circuit employs a DWADAC, which includes a weighted pointer to supply input digital signals to multiple segment elements that construct the DAC. The construction and number of pointers in the DWADAC are determined based on the type and order of the filter positioned before the ADC. Another significant patent is for a complex band-pass filter designed for digital radio receivers, along with a complex band-pass AD modulator that utilizes the same technology. This first-order complex band-pass filter features multiplexers that are alternately switched between time intervals of phases A and B, allowing for advanced signal processing.
Career Highlights
Hiroyuki Hagiwara has worked with esteemed organizations such as the Semiconductor Technology Academic Research Center and Gunma University. His experience in these institutions has allowed him to develop and refine his innovative technologies.
Collaborations
Hagiwara has collaborated with notable colleagues, including Hao San and Haruo Kobayashi. Their combined expertise has contributed to the advancement of modulation technologies.
Conclusion
Hiroyuki Hagiwara's contributions to high-precision modulation technologies demonstrate his commitment to innovation in the field. His patents reflect a deep understanding of signal processing and a drive to enhance communication technologies.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile