DynamEQ
廬
II
WDRC System
GR3031/GR3032 - DATA SHEET
FEATURES
鈥?dual channel signal processing
鈥?2nd (4th) order state variable filter
鈥?adjustable crossover frequency
鈥?adjustable compression ratio from 1:1 to 4:1
鈥?independent compression ratio adjustment for
low and high frequency band
鈥?adjustable AGC threshold levels
鈥?unique twin average detectors
鈥?handles high input levels
鈥?low THD and IMD distortion
鈥?drives class D Integrated Receivers
鈥?MPO range externally adjustable
鈥?reflowable package
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
廬
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
廬
II hybrid family is a second generation Wide
Dynamic Range Compression (WDRC) system.
GR3031 (GR3032) hybrid incorporates 12 dB/oct (24 dB/oct)
filtering. All capacitors necessary for operation are included.
The hybrid was designed for reflowability.
The gain and frequency response is dependant on the user鈥檚
environment.
V
B
16
C6
0碌22
1M
C5
10n
1M
1:1
14
2:1
10
4:1
11
R
HI
12
RLO
13
V
REG
9
C1
0碌1
REGULATOR
SLOW
AVERAGE
DETECTOR
FAST
AVERAGE
DETECTOR
1
R
TH
15
50k
R
AGC_IN
RH
C2
IN 8
0碌2
10k
-A
12 dB / Oct
(24 dB / Oct)
BAND SPLIT
FILTER
High Frequency
Expander / Compressor
-B
-C
0碌1
48k
RL
12k
14k
Low Frequency
Expander / Compressor
5
MPO
8k4
48k
C4
17 OUT
CONTROL
RECTIFIER
X
Vb
GND
6
C3
0碌1
7
2
FOUT
C7
0碌22
1
3
4
BOUT
GR3031
(GR3032)
All resistors in ohms, all capacitors
in microfarads, unless otherwise stated
Patent Pending
R茠c
BCIN BIN
FUNCTIONAL BLOCK DIAGRAM
Document No. 521 - 35 - 03
Revision Date: May 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
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