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9-5 Field Width and Connection Methods in Lighting Amplifiers:

The width of the amplification field must be wide in lighting amplifiers or visual signal amplifiers because it enlarges the frequency band between (20) Hz to 3.5 MHz. This is to show the fine details of the image clearly - and the methods of linking or connecting between the lighting amplifiers are a resistance circuit and a capacitor (RC), or direct linking -

Transformer connections are not used because they cause losses in some high frequencies and lead to image distortion. Peaking coils are used to increase the high-frequency response. With stray capacitances of the zoom circuit, a resonant circuit whose frequency is the high frequency of the visual signal, and thus these frequencies are stronger than the low frequencies, and the image appears whiter than the original image, so a circuit is used to control the image resolution (Sharpness) to pass part of the high frequencies to the ground - This is to compensate for the effect of the apex files if the effect is strong and distorts the image - and the apex files may be sequential, discrete, or mixed, as in Figure (9-9). Figure (10-9) is the image output stage diagram of a black and white Seronix device, using an integrated circuit and transistors. Figure (11-9) shows the use of an integrated circuit in the luminance signal amplifier (Y) in a color device (Grundeck).