EEWorld咨询电话：82357002，82350740－8068 邮件咨询：datasheet@eeworld.com.cn
器件描述：Video Buffer with Strobed DC Restore
器件厂商：GENNUM [Gennum Corporation]
厂商主页：http://www.gennum.com
文件大小：140.82KB
文件页数：5
PDF阅读：GB4551.pdf (点击阅读器件资料)
摘要：
FEATURES
? accurate clamping to within ±1mV
? ultra low differential gain (0.03% typ.)
and differential phase (0.03
o
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
Pin No. GB4551 Function
1 +IN non-inverting input
2V
CC
positive power supply
3 STB strobe
4 GND ground
5C
X
external capacitor
6V
EE
negative power supply
7 - IN inverting input
8 OUT output
ORDERING INFORMATION
Part Number Package Type Temperature Range
GB4551-CSA 8 Pin SIP 0 to 70
o
C
GENNUM CORPORATION P.O. Box 489, Stn A, Burlington, Ontario, Canada L7R 3Y3 tel. (905) 632-2996 fax: (905) 632-2055
Japan Branch: B-201 Miyamae Village, 2-10-42 Miyamae, Suginami-ku Tokyo 168, Japan tel. (03) 3247-8838 fax: (03) 3247-8839
DATA SHEET
GB4551 Video Buffer with
Strobed DC Restore
Document No. 520 - 52 - 2
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.
APPLICATIONS
? Input buffering and DC restoration to crosspoint switches
? Accurate back porch video signal clamping
? Inter-circuit buffering and DC restoration.
V
CC
500
10k
–IN
OUT
C
X
30k
+IN
V
EE
STROBE
12pF
10k
GND
(+2V OUTPUT CLAMP)
7mA
NOM.
+
-
+
-
SIMPLIFIED CIRCUIT DIAGRAM
All resistors in ohms, all capacitors in microfarads unless otherwise stated.
PIN CONNECTIONS
1 2 3 4 5 6 7 8
GB4551
相关器件：GB4551-CSA
|
