LM1204 datasheet(11/20 Pages) NSC

tên linh kiện	LM1204

Giải thích chi tiết về linh kiện	150 MHz RGB Video Amplifier System

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30 Stability Considerations (Continued)

series with a capacitor connected from the video output pin

to ground (see Test Circuit

Figure 1 ) A 110X to 200X

resistor in series with 10 pF is quite adequate for most appli-

cations However if oscillations don’t cease then the value

of the resistor should be decreased or the value of the ca-

pacitor should be increased or a combination of the two

Non-Gated High

Frequency Application

By connecting the back porch width adjust pin (pin 22) to

VCC the LM1204 functions as a non-gated amplifier requir-

ing no sync or blanking signals

Figure 9 shows a triple high

frequency amplifier with variable gain and DC offset control

In this mode of operation filtered DC feedback must be

provided to pins 28 33 and 38 as shown in

Figure 9

LM1204

TLH11238 – 9

FIGURE 2 Block Diagram Showing Timing Circuitry and Green Video Channel

TLH11238 – 10

FIGURE 3 Composite Video and Timing Signals

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