Color TV Receiver Block Diagram Explanation | New Topic

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Author Name: Arun Paul.

Color TV Receiver Block Diagram Explanation

Here we have describe the block diagram of color TV receiver and explains the color TV receiver working principle –

The colour receiver is a normal superheterodyne receiver of the monochrome system up to the video detector stage. The detector detects Y and C signals. In a colour decoder section, the C signal is separated by a bandpass filter, and (B-Y) and (R-Y), are decoded, using a synchronous quadrature detector. The third signal (G-Y) is obtained with the help of a resistive matrix. Then, the Y signal is added to each colour-difference signal to get the original camera signals about red, green and blue colours.

These three colour signals are converted into coloured lights by making phosphor elements of the colour picture tube glow red, green and blue for every pixel. The eye integrates these primary colours by additive mixing and sees the resultant original colour. All the pixels on the screen are made to glow in quick succession with the help of deflection circuits which produce horizontal and vertical deflection currents for scanning the screen. Thus, the coloured picture is reproduced on the screen of the picture tube.

Sound is reproduced from the loudspeaker in the same manner as in case of a monochrome receiver.