DESCRIPTION
The GB4551 is a high performance video buffer with DC restore primarily used for accurate back porch clamping. The circuit features a wideband differential amplifier that can be configured as a gain stage. The output signal voltage is limited to +2V above the clamp level in order to prevent damage to crosspoints or other circuits connected to the output.

FEATURES
• accurate clamping to within ±1mV
• ultra low differential gain (0.03% typ.) and differential phase (0.03o typ.)
• wideband unity gain, can typically be flattened to ±0.1dB at 30MHz
• can be configured as a gain stage with reduced bandwidth.
• drives 100pF loads
• convenient 8 pin SIP packaging

APPLICATIONS
• Input buffering and DC restoration to crosspoint switches
• Accurate back porch video signal clamping
• Inter-circuit buffering and DC restoration