GT4123B Two Channel
Video Multiplier
DATA SHEET
FEATURES
DESCRIPTION
The GT4123B is a monolithic dual-channel video multiplier
for use in a wide range of applications including broadcast
and multimedia.
Featuring two wideband video inputs and a single control
input, the GT4123B achieves broadcast quality mixing of
two video input signals to a single output by implementing
the function:
V
O
= [ ( V
C
• V
A
) + (1 - V
C
) • V
B
]
where V
C
is the control input voltage, which may be varied
continuously over the range 0 V to 1 V, and V
A
and V
B
are
the video input signals.
The GT4123B is a low power version of the GT4123 and
GT4123A Video Multipliers which operates from ±5 V
supply voltages and typically draws only 15 mA of current.
two-quadrant video multiplication
operation from ±4.5 V to ±13.2 V supply voltages
20 MHz ±0.1 dB video & control channel bandwidth
ultra low differential gain & differential phase
convenient 8 pin package
Pb-free and Green
APPLICATIONS
•
Multimedia Graphics Overlay
•
Production Switchers
•
Linear Keyers
PIN CONNECTIONS
GT4123B
FUNCTIONAL BLOCK DIAGRAM
VIDEO IN A
OUTPUT
FREQ. COMP
CONTROL
GROUND
1
2
3
4
8
7
6
5
V
FREQ
COMP
MULTIPLIER
CORE
cc
VIDEO IN B
V
VIDEO IN B
EE
OUTPUT
VIDEO IN A
CONTROL
ORDERING INFORMATION
Part
Number
GT4123BCDA
GT4123BCKA
GT4123BCTA
GT4123BCKAE3
Package
Type
8 pin PDIP
8 pin SOIC
8 pin SOIC Tape
8 pin SOIC
Temperature
Range
0° to 70° C
0° to 70° C
0° to 70° C
0° to 70° C
Pb-Free
and Green
No
No
No
Yes
V
REF
(0.5V)
(INTERNAL)
Revision date: July 2004
Document No. 521 - 20 - 02
GENNUM CORPORATION P.O. Box 489, Stn A, Burlington, Ontario, Canada L7R 3Y3 tel. (905) 632-2996 fax: (905) 632-5946
Gennum Japan: Shinjuku Green Tower Building 27F 6-14-1, Nishi Shinjuku Shinjuku-ku, Tokyo 160-0023 Japan
Tel: +81 (03) 3349-5501
Fax: +81 (03) 3349-5505
GENNUM [ GENNUM CORPORATION ]
