Harman Kardon AVR 240, Service Manual

Page: 130 / 155

NJM2581
DUAL SUPPLY WIDE BAND 3ch VIDEO AMPLIFIER
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GENERAL DESCRIPTION
■
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PACKAGE OUTLINE
The NJM2581 is a dual supply voltage wide band 3ch
video amplifier. It is suitable for Y, Pb, and Pr signal because
frequency range is 50MHz.
The
NJM2581 is suitable for Set Top Box, AV amplifier,
and other high quality AV systems.
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FEATURES
●
Operating Voltage ±4.5 to ±5.5V
●
Wide frequency range 50MHz at 0dB typ.
●
Internal 6dB Amplifier
●
Internal 75
Ω
Driver Circuit (2-system drive)
●
Power Save Circuit
●
Bipolar Technology
●
Package Outline DIP14, DMP14
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BLOCK DIAGRAM
NJM2581D NJM2581M
13
12
11
REF
1
2
3
4
7
5
6
14
8
10
9
V
+
1
VEE1
VEE2
VEE3
GND
VIN1
VIN2
VIN3
VOUT1
VOUT2
VOUT3
PowerSave
BIAS
6dB
AMP
75 Ω
Driver
BIAS
75
Ω
Driver
6dB
AMP
BIAS
75 Ω
Driver
6dB
AMP
V
+
2
V
+
3
AVR240 harman/kardon
130