NJM2181
PRELIMINARY
Passive Matrix TruSurround
TM
3D AUDIO PROCESSOR
s
GENERAL DESCRIPTION
The NJM2181 is a Passive Matrix TruSurround
TM
3D audio
processor. It regenerates the full surround soundfield directly
from any kinds of surround encoded stereo input (Lt/Rt)
signals.
After the internal passive matrix circuit decodes Lt/Rt signal
into 4 channel signals, the TruSurround virtualizer re-
encodes them into 2 channel surround signals. Accordingly
any pre-processors decoding into 4 channel signals are not
required.
The NJM2181 also includes SRS 3D Stereo and 3D Mono,
and regenerates a 3D sound field from either normal L/R
input or monoural input.
The NJM2181 is suitable for TV, mini component, CD radio
cassette, multimedia speaker system, and others.
sPACKAGE
OUTLINE
NJM2181L
NJM2181M
sFEATURES
q
Operating Voltage
q
Maximum input Voltage
q
Low Output Noise
q
BYPASS Gain
q
Passive Matrix TruSurround
q
SRS 3D Stereo & 3D Mono
q
BYPASS FUNCTION
q
Bipolar Technology
q
Package Outline
(4.7 to 13V)
(1.5Vrms typ. at TruSurround)
(32µVrms typ. at TruSurround)
(0dB typ.)
(Two-grade Switch for 3D Effect)
(Through)
SDIP24, DMP24
The SRS, TruSurround technology right incorporated in the NJM2181 are owned by SRS Labs, a U.S. Corporation and licensed to New
Japan Radio Co., Ltd. SRS, TruSurround is protected under U.S. and foreign patents issued and/or pending. SRS, TruSurround and
the
,are trademarks of SRS Labs, Inc. in the United States and selected foreign countries. Neither the purchase of the NJM2181, nor
the corresponding sale of audio enhancement equipment conveys the right to sell commercialized recordings made with any SRS
technology.
SRS Labs requires that all users of the NJM2181 must enter into a license agreement directly with SRS Labs if the royalty is not
included in the purchase price. SRS Labs also requires any users to comply with all rules and regulations as outlined in the SRS
Trademark Usage Manual.
For further information, please contact:
SRS Labs, Inc.
2909 Daimler Street. Santa Ana, CA 92705 USA
Tel:714-442-1070
Fax:714-852-1099
http://www.srslabs.com
-1-
NJM2181
sAPPLICATION
CIRCUIT
GND
10uF/35V
C21
Rch INPUT
Rch OUTPUT
Lch OUTPUT
Lch INPUT
GND
GND
VREF
GND
GND
GND
100uF/25V
10uF/35V
10uF/35V
C15
0.0047uF
C17
0.22uF
C18
0.22uF
10uF/35V
0.01uF
C20
C22
C16
100uF/25V
C19
10uF/35V
V+
12V
C14
C13
C12
3D-2
24
LIN
23
RIN
22
FIL13
21
FIL12
20
FIL11
19
FIL10
18
LOUT
17
ROUT
16
V+
15
VREFIN
14
VREFOUT
13
GND
10K
R10
3D-1
MODE3
10K
MODE2
NJM2181
MODE1
MODE2
MODE3
FIL3
FIL1
FIL2
FIL4
FIL5
FIL6
FIL7
FIL8
FIL9
R9
10K
MODE1
R8
1
2
3
4
5
6
7
8
9
10
11
12
GND
1.8K
R1
R3
C5
C6
C7
C4
0.1uF
C8
0.01uF
0.22uF
10uF/35V
C11
GND
2MEG
33K
R5
R4
75K
GND
0.0047uF
GND
GND
GND
GND
1.5K
C2
0.0047uF
C1
0.01uF
VREF
51K
C3
R6
R7
10uF/35V
C10
10uF/35V
R2
0.0047uF
0.1uF
C9
[CAUTION]
The specifications on this databook are only
given for information , without any guarantee
as regards either mistakes or omissions. The
application circuits in this databook are
described only to show representative usages
of the product and not intended for the
guarantee or permission of any right including
the industrial rights.
-5-
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