Location History:
- Tsurugashimamachi, JP (1985 - 1986)
- Saitama, JP (1986 - 1997)
Company Filing History:
Years Active: 1985-1997
Title: Toyojiro Naokawa: Innovator in Audio Amplification Technology
Introduction
Toyojiro Naokawa is a notable inventor based in Saitama, Japan. He has made significant contributions to the field of audio amplification technology, holding a total of 7 patents. His innovative designs focus on enhancing audio quality and eliminating common issues associated with traditional amplifiers.
Latest Patents
One of Naokawa's latest inventions is the "No turn-on pop noise amplifier." This audio amplifier is designed to operate without the disruptive pop noise that often occurs when the device is powered on. The amplifier achieves this through several key features: an input stage that operates under zero common-mode input voltage, an output stage that maintains the low voltage end of its voltage swing very close to ground voltage, and a system of shunt circuits that discharge external capacitors. This design prevents pop noises caused by residual charges in the external capacitors during subsequent power-ups. Additionally, the invention includes two peripheral collector transistors that implement a window comparator for discharging the input terminals, bias voltage, and output terminal of the audio amplifier.
Career Highlights
Toyojiro Naokawa is currently employed at National Semiconductor Corporation, where he continues to develop innovative audio technologies. His work has significantly impacted the audio industry, providing solutions that enhance user experience and audio fidelity.
Collaborations
Naokawa has collaborated with notable colleagues, including Hiroshi Hirayama and William H Gross. These partnerships have fostered a creative environment that encourages the development of cutting-edge audio technologies.
Conclusion
Toyojiro Naokawa is a distinguished inventor whose work in audio amplification technology has led to significant advancements in the field. His innovative designs, particularly the no turn-on pop noise amplifier, demonstrate his commitment to improving audio quality and user experience.
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.