GB4551
GB4551 is Video Buffer manufactured by Gennum.
FEATURES
- accurate clamping to within ±1m V
- ultra low differential gain (0.03% typ.) and differential phase (0.03o typ.)
- wideband unity gain, can typically be flattened to ±0.1d B at 30MHz
..
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. The clamping action occurs when the STROBE (STB) input is taken to ground. A typical application would be for DC restoration during the back porch period. In this case the negative-going back porch pulse would be derived from an external sync separator circuit. The GB4551 will operate from ± 9V to ± 12V power supplies and will directly interface with Gennum’s video crosspoint switches. The 8 pin SIP package is ideally suited for space restricted board layouts. GB4551 APPLICATIONS
- Input buffering and DC restoration to crosspoint switches 1 2 3 4 5 6 7 8
- Accurate back porch video signal clamping
- Inter-circuit buffering and DC restoration.
- can be configured as a gain stage with reduced bandwidth.
- drives 100p F loads
- convenient 8 pin SIP packaging
PIN CONNECTIONS
Pin No. 1 2 3 4 5 6 7 8
GB4551 +IN VCC STB GND CX VEE
- IN OUT
Function non-inverting input positive power supply strobe ground external capacitor negative power supply inverting input output
(+2V OUTPUT CLAMP)
+IN
10k 500
30k
+ 12p F
+ 10k
- IN
- ORDERING INFORMATION
STROBE 7m A NOM. VEE VCC
All resistors in ohms, all capacitors in microfarads unless otherwise stated.
Part Number GB4551-CSA
Package Type 8 Pin SIP
Temperature Range 0 to 70o C
SIMPLIFIED CIRCUIT DIAGRAM
Document No. 520
- 52
- 2
GENNUM CORPORATION P.O. Box 489, Stn A, Burlington, Ontario, Canada L7R 3Y3
Japan Branch: B-201 Miyamae Village, 2-10-42...
