DESCRIPTION
The GB4571 is a high performance video buffer with DC restore used primarily for accurate back porch clamping. Key features include operation from ±4.5 V to ±13.2 V supply voltages, fast recovery from sudden changes in DC offset, ±0.1 dB flatness to 80 MHz and availability of industry standard DIP and SOIC packages.

FEATURES
• accurate clamping to within ± 1 mV
• less than 1 mV clamping distortion
• variable clamping range (VEE + 3.0 V to VCC - 4.5 V)
• ultra low differential gain and differential phase
• fast recovery from sudden changes in DC offsets
• less than ± 0.15° phase delay variation at 3.58 MHz
• ± 0.1 dB flatness to 80 MHz
• ± 4.5 V to ±13.2 V supply voltage range

APPLICATIONS
• Clamping of NTSC, PAL, SECAM & RGB Video Signals
• Multimedia Graphics Overlay
• Production Switchers
• Linear Keyers