DynamEQ
®
II
WDRC System
GS3031/GS3032 DATA SHEET
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)
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.
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.
V
B
16
C6
0µ22
1M
C5
10n
1M
1:1
14
2:1
10
4:1
11
R
HI
12
RLO
13
V
REG
9
C1
0µ1
REGULATOR
SLOW
AVERAGE
DETECTOR
FAST
AVERAGE
DETECTOR
1
R
TH
15
50k
R
AGC_IN
RH
C2
IN 8
0µ2
10k
-A
12 dB / Oct
(24 dB / Oct)
BAND SPLIT
FILTER
High Frequency
Expander / Compressor
-B
-C
0µ1
48k
RL
12k
14k
Low Frequency
Expander / Compressor
5
MPO
8k4
48k
C4
17 OUT
CONTROL
RECTIFIER
X
Vb
GND
6
C3
0µ1
7
2
FOUT
C7
0µ22
1
3
4
BOUT
GS3031
(GS3032)
All resistors in ohms, all capacitors
in microfarads, unless otherwise stated
Patent Pending
Rƒc
BCIN BIN
FUNCTIONAL BLOCK DIAGRAM
Document No. 521 - 52 - 02
Revision Date: July 1998
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
GENNUM [ GENNUM CORPORATION ]
