Masayasu Niimi

Title: Masayasu Niimi and His Color Eliminating Circuit.

Introduction

Masayasu Niimi is an inventor associated with Hiroshima, Japan, and Hitachi, Ltd. His recorded patent work includes a color eliminating circuit designed to improve the handling of weak color television signals.

Latest Patents

Niimi is associated with 1 patent, titled “Color Eliminating Circuit.” The invention uses a killer detection circuit to detect a color burst signal and provide a killer output voltage to a band amplifier. When the voltage exceeds the amplifier’s operating threshold, the amplifier processes the chromatic signal; when it falls below that threshold, amplification stops. A control circuit supplies a gate pulse for detecting the color burst and interrupts that pulse when the killer voltage is too low. This helps prevent noise in extremely weak received signals from raising the voltage enough to activate the band amplifier inadvertently.

Career Highlights

Niimi’s patent identifies Hitachi, Ltd. as the company associated with his work. The circuit reflects an engineering focus on reliable color-signal processing under low-signal-strength conditions.

Collaborations

Yozo Tanihara is identified as Niimi’s coworker. The available information does not specify whether Tanihara collaborated on the patent.

Conclusion

Masayasu Niimi’s recorded invention addresses a specific challenge in color-signal reception by helping prevent noise from triggering unwanted amplification when received signals are weak.