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GS3031 Datasheet PDF : 8 Pages
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FEATURES
• dual channel signal processing
• 2nd (4th) order state variable filter
• adjustable crossover frequency
• adjustable compression ratio from 1:1 to 4:1
• independent compression ratio adjustment for
low and high frequency band
• adjustable AGC threshold levels
• unique twin average detectors
• handles high input levels
• low THD and IMD distortion
• drives Class D Integrated Receivers
• MPO range externally adjustable
STANDARD PACKAGING
Hybrid Typical Dimensions
0.250 in x 0.115 in x 0.080 in)
(6.35 mm x 2.91 mm x 2.03 mm)
DynamEQ® II
WDRC System
GS3031/GS3032 DATA SHEET
DEVICE DESCRIPTION
The DynamEQ® II hybrid family is a second generation Wide
Dynamic Range Compression (WDRC) system.
GS3031 (GS3032) hybrid incorporates 12 dB/oct (24 dB/oct)
filtering. All capacitors necessary for operation are included
on the hybrid.
The gain and frequency response is dependant on the user’s
environment.
Twin Averaging Detector circuits are optimized for sound
quality during normal listening without sacrificing comfort
during sudden loud inputs.
All input signals to DynamEQ® II, are processed by 2:1
compression before subsequent band splitting.
The 12 dB/oct (24 dB/oct) band split filter ahead of the
expander/compressor circuits allows for independent
compression ratio adjustment (1:1 to 4:1) in high and low
frequency channels.
The gain setting stage is followed by a class D Integrated
Receiver preamplifier stage. Symmetrical peak clipping is
used to achieve MPO adjustment.
VREG 9
C1
0µ1
RTH 15
C2
IN 8
0µ2
GND 6
VB
1:1 2:1
4:1
RHI RLO
16
14
10
11
12 13
C6
C5
0µ22
10n
1M
1M
REGULATOR
SLOW
AVERAGE
DETECTOR
FAST
AVERAGE
DETECTOR
50k
10k
CONTROL
RAGC_IN
-A
1
RECTIFIER
X
12 dB / Oct
(24 dB / Oct)
BAND SPLIT
FILTER
12k
14k
RH
High Frequency
Expander / Compressor
RL
Low Frequency
Expander / Compressor
Vb
48k
-B
-C
C4
17 OUT
0µ1
48k
8k4
5 MPO
All resistors in ohms, all capacitors
in microfarads, unless otherwise stated
Patent Pending
C3
0µ1
7
Rƒc
C7
0µ22
2
13 4
FOUT BCIN BIN BOUT
FUNCTIONAL BLOCK DIAGRAM
GS3031
(GS3032)
Revision Date: July 1998
Document No. 521 - 52 - 02
GENNUM CORPORATION P.O. Box 489, Stn. A, Burlington, Ontario, Canada L7R 3Y3 tel. +1 (905) 632-2996
Web Site: www.gennum.com E-mail: hipinfo@gennum.com
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