Company Filing History:
Years Active: 2000-2005
Title: Haruo Koizumi: Innovator in Automatic Gain Control Technology
Introduction
Haruo Koizumi is a notable inventor based in Sennan, Japan. He has made significant contributions to the field of electronic engineering, particularly in the area of automatic gain control technology. With a total of 4 patents to his name, Koizumi's work has had a lasting impact on the industry.
Latest Patents
Koizumi's latest patents include an innovative automatic gain control method and circuit. This demodulator controls the gains of an RF-AGC amplifier and an IF-AGC amplifier to maintain a constant input level to the demodulator. The demodulator estimates the signal level of an RF input based on the sum of the gains directed to both AGC amplifiers. It adjusts the gain distribution methods according to whether the signal level exceeds a predetermined Take Over Point. Additionally, a first detection and smoothing circuit monitors the output level of the RF-AGC amplifier, while a second detection and smoothing circuit observes the output of a mixer. A comparison circuit then regulates the gain of the RF-AGC amplifier to ensure that the difference between the output levels reaches a predetermined value. This design allows for an automatic gain control circuit that achieves high receiving sensitivity and low waveform distortion, even in the presence of manufacturing dispersion.
Another significant patent is the tuner structure and cable modem tuner that Koizumi developed. This tuner structure features a circuit board with electronic components such as transistors and resistors mounted on it. It includes a chassis angle and a shield cover. A feedthrough capacitor for inputting and outputting power and control signals is mounted to a metal plate that runs parallel to the circuit board.
Career Highlights
Koizumi is currently employed at Sharp Kabushiki Kaisha Corporation, where he continues to innovate and develop new technologies. His work has been instrumental in advancing the capabilities of electronic devices.
Collaborations
Throughout his career, Koizumi has collaborated with notable colleagues, including Miyoshi Yamauchi and Mitsuhiro Noboru. These partnerships have contributed to the success of his projects and the development of new technologies.
Conclusion
Haruo Koizumi is a distinguished inventor whose work in automatic gain control technology has made a significant impact on the electronics industry. His innovative patents and contributions continue to shape the future