Location History:
- Fujisawa, JA (1976)
- Iwaki, JP (1982)
Company Filing History:
Years Active: 1976-1982
Title: Kazuhiko Yamazaki: Innovator in Stereophonic Technologies
Introduction
Kazuhiko Yamazaki is a distinguished inventor located in Fujisawa, Japan, known for his contributions to stereophonic technology. With a total of two patents, he has made significant advancements that enhance audio systems and tuners used in various applications.
Latest Patents
Yamazaki's latest patents include:
1. **AM Stereophonic Demodulator Circuit for Amplitude/Angle Modulation System** - This invention features an AM detector circuit for generating a stereophonic sum signal (L+R) and an FM or PM detector circuit for producing a stereophonic difference signal (L-R). The circuit includes control means to extract a DC voltage that corresponds to antenna input levels from the AM detector circuit, enabling effective gain control for the FM or PM detector stage.
2. **Local Oscillation Circuit for Tuner Having Reduced Inter-Channel** - This local oscillation circuit improves the automatic frequency control (AFC) sensitivity by utilizing a resonance circuit that varies its tuning frequency via a variable capacitive element. A variable capacitive diode is also incorporated, which adjusts according to the frequency variations detected from the tuner’s output signal.
Career Highlights
Kazuhiko Yamazaki is affiliated with Hitachi, Ltd., a reputable corporation known for its innovative technology solutions. His expertise and creations have contributed to enhancing audio technologies, proving him to be a vital asset in his field.
Collaborations
Throughout his career, Yamazaki has worked alongside notable colleagues such as Takeshi Saitoh and Yoshio Miura. Their teamwork has fostered a productive environment that encourages creativity and technological breakthroughs.
Conclusion
Kazuhiko Yamazaki continues to impact the world of audio engineering through his innovative patents and collaborations. His work exemplifies how creativity and technology can come together to enhance user experiences in stereophonic systems.