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GT4122-CKF

更新时间： 2024-11-18 03:40:03
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页数 文件大小 规格书
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GT4122 Video Multiplier

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GT4122-CKF 数据手册

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GT4 1 2 2 Video Multiplier  
DATA SHEET  
FEATURES  
DES CRIP TION  
• broadcast quality video multiplier  
The GT4122 multiplier is a monolithic dual-channel,  
broadcast quality video mixer.  
• 30 MHz at -1.0 dB video and control channel bandwidth  
• one external frequency compensation adjustment  
Featuring two wideband video inputs and a single control  
input, the GT4122 achieves high quality video mixing of  
thetwovideoinputsignalstoasingleoutputbyimplementing  
the function:  
• ultra low differential gain and differential phase,  
(typically 0.01 % and 0.01 deg.)  
• external DC offset and span trims  
• 20 pin PDIP and SOIC packaging  
APPLICATIONS  
V
OUT = VA • VC + VB (1 - VC)  
where VC is the control input voltage, which may be  
varied continuously over the control range and VA and VB  
are the video input signals.  
• Production switcher video mixers  
• Linear Keyers  
The GT4122 operates with power supply voltages of ± 10  
volts and typically draws 24 mA of current. The GT4122  
is available in a 20 pin DIP and 20 pin SOIC packaging.  
P IN CONNECTIONS  
TOP VIEW  
OUT  
BOS2  
-IN B  
+IN B  
BOS1  
AOS2  
-IN A  
+IN A  
AOS1  
REXT  
-VS  
+VS  
20  
PIN 1  
An Application Note entitled ‘Using the GT4122 and  
GT4124 Video Mixer ICs’ (Gennum Document 520-44) is  
available from Gennum Corporation.  
COMP  
COS1  
COS2  
S1  
ORDERING INFORM ATION  
Part No.  
Package Type  
20 PDIP  
Temperature  
0° to 70°C  
0° to 70°C  
VREF  
S2  
GT4122 - CDF  
GT4122 - CKF  
VC  
20 SOIC  
10  
11  
GND  
+
20 PIN DIP / SOIC  
+
-
IN A  
IN A  
AMP 1  
XA  
P IN DES IGNATION  
-
COMP  
OUT  
V
=0.5 + V  
CA  
K
1
2
3
4
5
6
7
8
9
-VS  
negative supply voltage  
+
A
OS1  
OS2  
IN B  
+VS positive supply voltage  
COMPoutput freq'y comp'n R-C  
COS1 control input offset adjust  
COS2 control input offset adjust  
AMP 4  
BIAS  
Σ1  
A
+
+
-
+
R
EXT  
AMP 2  
XB  
-
IN B  
OS1  
OS2  
S1  
span adjust  
+
-
V
K
+
+
V
VREF 0.5volt reference input  
S2  
VC  
B
Σ2  
Σ3  
AMP 3  
-
V
=0.5 - V  
CB  
K
span adjust  
control signal input  
V
REF  
B
V
K
A
K
+
V
C
+
-
V
S
10 GND ground  
0.5V  
V
NOM  
NOM  
+
-
+
-
S1  
11 REXT current setting resistor  
12 AOS1 A black level adjust (OFFSET)  
13 +IN A A video + input signal  
14 -IN A A video - signal input  
15 AOS2 A black level adjust (OFFSET)  
16 BOS1 B black level adjust (OFFSET)  
17 +IN B B video + signal input  
18 -IN B B video - signal input  
19 BOS2 B black level adjust (OFFSET)  
20 OUT multiplier output  
+
V
S
S 2  
GND  
C
C
OS2  
OS1  
Device Function: VOUT = VINA • [VNOM + AK (VC - VREF)] + VINB • [VNOM - AK (VC - VREF)]  
FUNCTIONAL BLOCK DIAGRAM  
Revision Date: January 1994.  
Document No. 520 - 25 - 4  
GENNUM CORPORATION P.O. Box 489, Stn A, Burlington, Ontario, Canada L7R 3Y3 tel. (905) 632-2996 fax: (905) 632-5946  
Japan Branch: A-302, Miyamae Village, 2-10-42 Miyamae, Suginami-ku, Tokyo 168, Japan tel. (03) 3334-7700 fax: (03) 3247-8839  
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