The UPC141AN is a monolithic integrated circuit designed for use as a chroma signal processor in color television receivers. Manufactured by NEC, this IC incorporates various functions necessary for processing the chroma signal, contributing to the accurate reproduction of colors in television displays.

Applications

• Color television receivers
• Video monitors
• Equipment processing composite video signals

Features

• Chroma signal processing
• Automatic color control (ACC)
• Automatic tint control (ATC)
• Color killer function
• Subcarrier regeneration

Benefits

• Improved color reproduction accuracy in television displays.
• Stable color performance under varying signal conditions.
• Elimination of color noise in the absence of a valid color signal.
• Simplified circuit design for color television receivers.

The UPC141AN integrates several key functions into a single chip. These include chroma amplification, automatic color control (ACC), automatic tint control (ATC), a color killer circuit, and a subcarrier regeneration circuit. The ACC circuit maintains a constant color level despite variations in the received signal strength. The ATC circuit automatically adjusts the tint of the picture to compensate for phase errors in the received signal. The color killer circuit disables the color circuits when a black and white signal is received, preventing color noise. The subcarrier regeneration circuit generates the color subcarrier signal used for demodulating the chroma signal.

This IC typically operates from a single power supply. It is packaged in a through-hole package, facilitating easy mounting on printed circuit boards. Its design allows for minimal external components, which can reduce the overall cost and complexity of television receiver designs. The UPC141AN contributes significantly to the performance and reliability of color processing in older television technology.