Location History:
- Gunma, JP (2006 - 2007)
- Kiryu, CN (2009)
- Kiryu, JP (2013)
Company Filing History:
3 out of 135 
2 out of 113 
Years Active: 2006-2013
Title: Hao San: Innovator in Complex Modulation Technologies
Introduction
Hao San is a prominent inventor based in Gunma, Japan, known for his contributions to the field of complex modulation technologies. With a total of 5 patents to his name, he has made significant advancements in digital signal processing.
Latest Patents
Hao San's latest patents include a complex bandpass AD modulator and a high-precision multi-band pass modulator. The complex bandpass AD modulator is designed to suppress the influence of an image component caused by a mismatch between I- and Q-channels on a signal component while maintaining low power consumption. This innovative modulator is composed of several key components, including a subtraction unit, a complex bandpass filter, an addition unit, a noise extraction circuit unit, an ADC unit, and a DAC unit. The noise extraction circuit unit plays a crucial role by extracting a quantized noise signal from the ADC unit and feeding it back to enhance the overall performance of the modulator.
The high-precision multi-band pass modulator reduces nonlinear noise through the use of a multibit DAC, ensuring minimal hardware and power consumption. In this design, a 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 weighted pointer to manage input digital signals effectively.
Career Highlights
Hao San has worked with notable institutions such as the Semiconductor Technology Academic Research Center and Gunma University. His work in these organizations has allowed him to develop and refine his innovative technologies.
Collaborations
Hao San has collaborated with esteemed colleagues, including Haruo Kobayashi and Hiroyuki Hagiwara, contributing to the advancement of complex modulation technologies.
Conclusion
Hao San's innovative work in the field of complex modulation has positioned him as a key figure in digital signal processing. His patents reflect a commitment to enhancing technology while addressing challenges in power consumption and signal integrity.
Inventor’s Patent Attorneys refers to legal professionals with specialized expertise in representing inventors throughout the patent process. These attorneys assist inventors in navigating the complexities of patent law, including filing patent applications, conducting patent searches, and protecting intellectual property rights. They play a crucial role in helping inventors secure patents for their innovative creations.