The LM1208 LM1209 is a very high frequency video amplifier system intended for use in high resolution RGB monitor applications In addition to the three matched video amplifiers the LM1208 LM1209 contains three gated single ended input black level clamp comparators for brightness control three matched DC controlled attenuators for contrast control and three DC controlled drive attenuators providing independent full range gain control in each channel for wide range white balance All DC control inputs offer high input impedance and an operation range from 0V to 4V for easy interface to bus controlled alignment systems The LM1208 LM1209 also contains a blanking circuit which clamps the video output voltage during blanking to within 0 1V above ground This feature provides blanking capability at the cathodes of the CRT A spot killer is provided for CRT phosphor protection during power-down