DynamEQ
®
II
WDRC System
GR3031/GR3032 - 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
• 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
®
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.
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’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
GR3031
(GR3032)
All resistors in ohms, all capacitors
in microfarads, unless otherwise stated
Patent Pending
Rƒc
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
ABSOLUTE MAXIMUM RATINGS
PARAMETER
Supply Voltage
Power Dissipation
Operating Temperature Range
Storage Temperature Range
VALUE / UNITS
3 VDC
25 mW
-10° C to 40° C
OUT
-20° C to 70° C
17
VB
16
RTH
15
PAD CONNECTION
1:1
14
RLO
13
RHI
12
4:1
11
2:1
10
VREG
9
8
IN
CAUTION
CLASS 1 ESD SENSITIVITY
1
2
3
4
5
6a
GND
6b
7
Rƒc
BCIN FOUT
BIN BOUT MPO
ELECTRICAL CHARACTERISTICS
Conditions: Supply Voltage V
B
= 1.3 V, Frequency = 1 kHz, Temperature = 25°C
PARAMETER
Hybrid Current
Minimum Voltage
Total Harmonic Distortion
THD with Maximum Allowable Input
Input Referred Noise
Total System Gain
Regulator Voltage
AGC
Lower Threshold
Upper Threshold
Compression Gain Range
System Gain in Compression
Min. Compression Ratio
SYMBOL
I
AMP
Vb
THD
THD
M
IRN
A
V
V
REG
CONDITIONS
MIN
-
1.1
TYP
370
-
0.2
2
3.0
49
930
MAX
530
-
1.0
10
-
52
1000
UNITS
µA
V
%
%
µV
RMS
dB
mV
V
IN
= -40dBV at 1kHz
V
IN
= -23dBV, Rvc = 47kΩ
Aweight
V
IN
= -90dBV
I
LOAD
= 30µA
-
-
-
46
890
TH
LO
TH
HI
∆A
A
60
CMP
1 :1
Gain(-90dBV
IN
) -Gain(-30dBV
IN
)
V
IN
=-60dBV
V
IN
=3kHz, -60dBV to -40dBV,
Rhp=1:1 Rlp=1:1
-91
-36
37.5
26
-87
-32
40.5
29
-83
-28
43.5
32
dBV
dBV
dB
dB
0.9
1.0
1.1
Ratio
Max. Comp. Ratio
CMP
4 :1
V
IN
=3kHz, -60dBV to -40dBV,
Rhp=4:1, Rlp=4:1
3.6
-
-
4.0
10
220
4.3
-
-
Ratio
ms
ms
Fast Detector Time Constant
Slow Detector Time Constant
FILTER
Maximum Cross-over Frequency
Nominal Cross-over Frequency
Minimum Cross-over Frequency
Filter Rolloff Rate (GS3027)
(GS3028)
STAGE A and B
Open Loop Gain (B)
Input Impedance (A)
OUTPUT STAGE
Stage Gain
Max Output Level
MPO Range
Output Resistance
τ
FAST
τ
SLOW
ƒ
c_0
ƒ
c_22
ƒ
c_220
R
ƒc
=0Ω
R
ƒc
=22kΩ
R
ƒc
=220kΩ
3.0
1.5
-
-
-
-
3.9
1.9
0.9
12
24
-
52
11
-
2.3
1.4
-
-
-
-
13
kHz
kHz
kHz
dB/oct
dB/oct
A
OL_B
R
IN
-
9
dB
kΩ
A
C
MPO
∆MPO
R
OUT
V
IN
=-30dBV
R
VC
=220kΩ,V
IN
=-25dBV
R
MPO
=0Ω to 50kΩ
7
-14.5
13
-
9
-12.5
15
24
11
-10.5
17
-
dB
dBV
dB
kΩ
All conditions and parameters remain as shown in Test Circuit unless otherwise stated in "CONDITIONS" column.
521 - 35 - 03
2
V
B
16
C6
0µ22
1M
14
C5
10n
1M
10
11
12
13
9
2µ2
C1
0µ1
REGULATOR
SLOW
AVERAGE
DETECTOR
FAST
AVERAGE
DETECTOR
1
15
R =
∞
TH
50k
CONTROL
R
AGC_IN
RH
3.9k
8
C2
0µ2
10k
-A
12 dB / Oct
(24 dB / Oct)
BAND SPLIT
FILTER
High Frequency
Expander / Compressor
-B
-C
0µ1
RL
Low Frequency
Expander / Compressor
14k
5
8k4
48k
50k
48k
C4
17
RECTIFIER
X
Vb
V
IN
6
12k
C3
0µ1
7
2
R
ƒc
= 22k
C7
0µ22
1
3
4
GR3031
(GR3032)
R
=0
MPO
All resistors in ohms, all capacitors
in microfarads, unless otherwise stated
R = 100k
VC
Fig. 1 Production Test Circuit
RHI
200k Linear
VB
RLO
200k Linear
16
C6
0µ22
1M
14
C5
10n
1M
10
11
12
13
9
C1
0µ1
RTH
100k
Log
REGULATOR
SLOW
AVERAGE
DETECTOR
FAST
AVERAGE
DETECTOR
1
15
50k
R
AGC_IN
RH
High Frequency
Expander / Compressor
48k
C4
-B
-C
0µ1
48k
RL
Low Frequency
Expander / Compressor
14k
8k4
2µ2
Any
Knowles
Class D
receiver
R
MPO
50k
Log
C3
0µ1
7
2
R
ƒc
100k Log
C7
0µ22
1
3
4
2
17
CONTROL
RECTIFIER
X
Vb
VB
C2
8
0µ2
Any Knowles
or
Microtronic
microphone
10k
-A
12 dB / Oct
(24 dB / Oct)
BAND SPLIT
FILTER
6
12k
5
GR3031
(GR3032)
All resistors in ohms, all capacitors
in microfarads, unless otherwise stated
R
VC
100k Log
Fig. 2 Maximum Flexibility Hearing Instrument Application
3
521 - 35 - 03
VB
16
C6
0µ22
1M
C5
10n
1M
14
10
11
12
13
9
C1
0µ1
REGULATOR
SLOW
AVERAGE
DETECTOR
FAST
AVERAGE
DETECTOR
1
15
50k
R
AGC_IN
RH
C2
8
Any Knowles
or
Microtronic
microphone
CONTROL
RECTIFIER
X
Vb
VB
48k
C4
-B
-C
0µ1
48k
RL
8k4
Any
Knowles
Class D
receiver
5
17
10k
-A
0µ2
12 dB / Oct
(24 dB / Oct)
BAND SPLIT
FILTER
High Frequency
Expander / Compressor
6
12k
14k
Low Frequency
Expander / Compressor
C3
0µ1
7
2
C7
0µ22
1
3
4
GR3031
(GR3032)
All resistors in ohms, all capacitors
in microfarads, unless otherwise stated
R
VC
100k Log
Fig. 3 Minimum Component Hearing Instrument Application
R
HI1
= 200k
R
HI2
= 0
V
B
=1.3V
R
LO1
= 200k
16
C6
0µ22
1M
C5
10n
1M
14
10
11
R
LO2
= 0
12
13
9
2µ2
C1
0µ1
REGULATOR
SLOW
AVERAGE
DETECTOR
FAST
AVERAGE
DETECTOR
1
15
R
TH
CONTROL
50k
R
AGC_IN
RECTIFIER
X
Vb
=
∞
3.9k
8
Pink Noise
Generator
or
1kHz for I/O
C2
0µ2
10k
-A
12 dB / Oct
(24 dB / Oct)
BAND SPLIT
FILTER
RH
High Frequency
Expander / Compressor
48k
C4
-B
-C
0µ1
48k
17
6
12k
14k
RL
Low Frequency
Expander / Compressor
8k4
50k
5
C3
0µ1
7
2
C7
0µ22
1
3
4
GR3031
(GR3032)
R
MPO
=0
All resistors in ohms, all capacitors
in microfarads, unless otherwise stated
R
ƒc
=100k
R
VC
=100k
Fig. 4 Characterization Circuit (Used to generate typical curves)
521 - 35 - 03
4
TYPICAL PERFORMANCE CURVES
-10
-20
50
V
IN
= -96dBV
V
IN
= -80dBV
3:1
-30
-40
-50
-60
-70
-80
-90
-100
0
1.2:1
1:1
1.5:1
4:1
30
2:1
40
V
IN
= -60dBV
OUTPUT LEVEL (dBV)
GAIN (dB)
20
V
IN
= -40dBV
V
IN
= -20dBV
10
-90
- 80
-70
-60
-50
-40
-30
-20
-10
20
100
1k
10k
20k
INPUT LEVEL (dBV)
FREQUENCY (Hz)
Fig. 5 I/O Transfer function for Different Compression Ratios
Fig. 6 Frequency Response for Different Input Levels
1.0
0.9
50
V
IN
= -60dBV
40
R
VC
= 220kΩ
R
VC
= 100kΩ
30
)
R
HI1
+R
HI2
R
HI1
0.8
0.7
0.6
0.5
GAIN (dB)
R
VC
= 47kΩ
R
VC
= 22kΩ
R
VC
= 10kΩ
(
20
R
LO1
+R
LO2
0.4
0.3
0.2
R
LO1
10
0
0.1
0.0
1.0
1.4
1.8
2.2
2.6
3.0
3.4
3.8 4.0
-10
20
100
1k
10k
20k
COMPRESSION RATIO (RATIO)
FREQUENCY (Hz)
Fig. 7 Compression Settings Resistor Ratio for High Pass
Channel (R
HI1
& R
HI2
) and Low Pass Channel (R
LO1
& R
LO2
)
Fig. 8 Frequency Response for Different R
VC
Values
-10
COMPRESSION 1:1
R
M PO
= 0Ω
-10
-20
OUTPUT LEVEL (dBV)
OUTPUT LEVEL (dBV)
-20
R
M PO
= 10kΩ
R
M PO
= 22kΩ
-30
R
TH
=
∞
R
TH
= 0Ω
-30
R
M PO
= 50kΩ
-40
R
TH
= 10kΩ
-50
R
TH
= 22kΩ
R
TH
= 47kΩ
-60
R
TH
= 100kΩ
-40
-50
-50
-40
-30
-20
-70
-100
-90
-80
-70
-60
-50
-40
30
-20
INPUT LEVEL (dBV)
INPUT LEVEL (dBV)
Fig. 9 I/O Transfer Function for
Different R
MPO
Resistors
Fig. 10 I/O Transfer Function for
Different R
TH
Resistors
5
521 - 35 - 03
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