DynamEQ
I
Dynamic Equalizer
FEATURES
handles high input levels (up to 100 mV
RMS)
cleanly
low THD and IMD distortion
unique twin average detectors
dual channel signal processing
adjustable AGC threshold levels
highpass filter with adjustable corner frequency
2:1 compression of high frequencies
no external capacitors or resistors required
30% smaller by volume than DynamEQ
I GS3011
STANDARD PACKAGING
Hybrid Typical Dimensions
0.250 in x 0.115 in x 0.115 in
(6.35 mm x 2.92 mm x 2.92 mm)
GS3020 - DATA SHEET
DESCRIPTION
The DynamEQ
I hybrid is a dynamically adaptive loudness
growth equalizer. Its gain and frequency response is
dependent on the user's environment, and is designed for
level dependant frequency response providing treble
increase at low levels (TILL). The unique twin averaging
detector circuit dramatically reduces pumping effects and
is optimized for mild to moderate hearing loss.
DynamEQ
I has two signal paths for dual channel processing
incorporating 4 amplifying stages ( A, B, C, D ) and the
AGC processing circuit.
Stage A is a highpass channel with 2:1 compression,
Stage B is a wideband unity gain buffer. The sum of the two
paths gives a high frequency boost to low level signals,
which gradually compresses to a flat response at high
input levels. Stage C is used for volume control adjustment,
while stage D is a class A power amplifier with receiver
bias current adjustment.
FUNCTIONAL BLOCK DIAGRAM
Revision Date: May 1998
01
100k
1k
- C
11
V
B
V
REG
C1
22
REGULATOR
SLOW
AVERAGE
DETECTOR
FAST
AVERAGE
DETECTOR
R
TH
CURRENT
REFERENCE
2:1
COMPRESSION
CONTROL
GS3020
R
E
C
HP
OUT
IN
MGND
C
OUT
C
IN
01
01
12k
C3
01
C2
3n9
- A
- B
R1
68k
RECTIFIER
D
24k
VB
R2
50k
GND
50k
515
22
100k
50k
50k
C4
C5
C7
C6
5
8
2
6
9
3
7
10
11
4
1
All resistors in ohms, all capacitors in farads unless otherwise stated.
Patent Pending.
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
Document No. 521 - 05 - 04
521 - 05 - 04
2
CAUTION
CLASS 1 ESD SENSITIVITY
ABSOLUTE MAXIMUM RATINGS
PARAMETER
VALUE / UNITS
Supply Voltage
3 VDC
Power Dissipation
25 mW
Operating Temperature Range
-10
C to 40
C
Storage Temperature Range
-20
C to 70
C
PAD CONNECTION
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
Hybrid Current
I
AMP
V
IN
= 0V
RMS
90
190
300
A
Minimum Voltage
V
B
1.1
-
-
V
Total Harmonic Distortion
THD
R
VC
= 15k
; V
IN
= -40dBV at1kHz
-
0.1
1
%
Input Referred Noise
IRN
NFB 0.2 to 10kHz at 12dB/oct
-
2.5
-
V
RMS
Total System Gain
A
V
52.5
55.5
58.5
dB
AGC
Compression Ratio
COMP
V
IN
= -60dBV & -80dBV, R
VC
= 15k
1.74:1
1.95:1
2.11:1
Ratio
Threshold
-
-94
-
dBV
Compression Gain Range
A
RANGE
R
VC
= 15k
; Note 1
26
28
-
dB
High Pass Corner Frequency
HPC
C
HP
- Not Connected
-
3.4
-
kHz
System Gain in Compression
A
80
V
IN
= -80dBV
45
47
49
dB
OUTPUT STAGE
Minimum Transducer Current
I
TR
R
E
- Not Connected
130
160
190
A
Maximum Current Sink
I
SINK
3
6
-
mA
Output Impedance
Z
OUT
20
24
28
k
R
E
Voltage
V
RE
52
56
60
mV
REGULATOR
Regulator Voltage
V
REG
0.89
0.95
0.99
V
All parameters and switches remain as shown in the Test Circuit unless otherwise stated in CONDITIONS column
V
PX
actual voltage measured on the pin at given condition (X is pin number)
Conditions: Input Level V
IN
= -97 dBV, Frequency = 5 kHz, Temperature = 25
C, Supply Voltage V
B
= 1.3 V
ELECTRICAL CHARACTERISTICS
Notes:
1.
A
RANGE
= V
P3
[V
IN
= -97dBV] - V
P3
[V
IN
= -20 dBV] + 77dBV
1
2
3
4
5
6
7
8
9
10
11
C
OUT
MGND
R
TH
R
E
OUT
CHP
V
REG
GND
V
B
C
IN
IN
521 - 05 - 04
3
R
E
100
ED1913
or
MODEL 2313
EK3024
or
MODEL 39
0
1
100k
1k
11
C1
2
2
REGULATOR
SLOW
AVERAGE
DETECTOR
FAST
AVERAGE
DETECTOR
CURRENT
REFERENCE
2:1
COMPRESSION
CONTROL
GS3020
R
VC
100k
MGND
0
1
0
1
12k
C3
0
1
C2
3n9
R1
68k
RECTIFIER
24k
VB
R2
50k
50k
515
2
2
100k
50k
50k
1.3V
5
8
2
6
9
3
7
4
1
10
11
1.3V
C7
C6
C4
C5
- A
- B
D
- C
100K
R
VC
V
IN
3k9
CHP
0
1
R
E
100
1.3V
1k
0
1
100k
1k
C7
C6
C4
C5
11
C1
2
2
REGULATOR
SLOW
AVERAGE
DETECTOR
FAST
AVERAGE
DETECTOR
CURRENT
REFERENCE
2:1
COMPRESSION
CONTROL
GS3020
0
1
0
1
12k
C3
0
1
C2
3n9
- A
- B
R1
68k
RECTIFIER
D
24k
VB
R2
50k
50k
515
2
2
1.3V
100k
50k
50k
5
8
2
6
9
3
7
10
11
4
1
- C
Fig.1 Production Test Circuit
All resistors in ohms, all capacitors in farads unless otherwise stated.
Microphones and receivers shown above are for illustrative purposes only.
Manufacturers can design with other appropriate transducers.
All resistors in ohms, all capacitors in farads unless otherwise stated.
Fig. 2 Example of Hearing Instrument Application
521 - 05 - 04
4
All resistors in ohms, all capacitors in farads unless otherwise stated.
R
VC
15k
V
IN
3k9
CHP
(Normally not
connected)
R
E
100
2.6V
1k82
0
1
100k
1k
11
C1
2
2
REGULATOR
SLOW
AVERAGE
DETECTOR
FAST
AVERAGE
DETECTOR
CURRENT
REFERENCE
2:1
COMPRESSION
CONTROL
GS3020
0
1
0
1
12k
C3
0
1
C2
3n9
R1
68k
RECTIFIER
24k
VB
R2
50k
50k
515
2
2
100k
50k
50k
5
8
2
6
9
3
7
10
11
4
1
1.3V
R
TH
=
C7
C6
C4
C5
- A
- B
D
- C
Fig. 4 Characterization Circuit (used to generate typical curves)
VOLUME
CONTROL
BATTERY
100
+
+
+
-
1
2
3
4
5
6
7
8
9
10
11
MIC
REC
ED1913
or
MODEL 2313
EK3024
or
MODEL 39
Fig. 3 Example of Assembly Diagram
Microphones and receivers shown above are for illustrative purposes only.
Manufacturers can design with other appropriate transducers.
521 - 05 - 04
5
V
IN
= -50dBV
FREQUENCY (Hz)
Fig. 7 Frequency Response for Different R
VC
Values
20 100 1k 10k 20k
-100 -90 -80 -70 -60 -50 -40 -30 -20 -10
INPUT LEVEL (dBV)
Fig. 9 I/O Transfer Function for Different R
TH
Resistors
R
TH
=
= 100k
= 47k
= 22k
= 0
V
IN
=-96dBV
20
100
1k 10k 20k
FREQUENCY (Hz)
Fig. 10 Frequency Characteristics for Different
R
TH
Values
-100 -90 -80 -70 -60 -50 -40 -30 -20 -10
INPUT LEVEL (dBV)
Fig. 6 I/O Transfer Function for Different Test
Frequencies. Shown for Min/Max R
TH
Resistors Values
1kHz
2kHz
5kHz
V
IN
=-40dBV
R
TH
= 0
R
VC
=100k
R
VC
=47k
R
VC
=15k
= 5kHz
1kHz
2kHz
5kHz
0
-10
-20
-30
-40
-50
-60
-70
-80
20 100 1k 10k 20k
FREQUENCY (Hz)
Fig. 5 Frequency Response for Different Input Levels
V
IN
=-96dBV
V
IN
=-88dBV
V
IN
=-80dBV
V
IN
=-60dBV
V
IN
=-20dBV
45
40
35
30
25
20
15
10
5
0
0
-10
-20
-30
-40
-50
-60
-70
-80
R
TH
=
R
VC
=22k
20
100
1k
10k 20k
FREQUENCY (Hz)
Fig. 8 Corner Frequency vs C
HP
Capacitor Value
V
IN
=-20dBV
V
IN
=-96dBV
22k
47k
100k
R
TH
=
45
40
35
30
25
20
15
10
5
0
45
40
35
30
25
20
15
10
5
0
C
HP
=100nF
C
HP
=68nF
C
HP
=33nF
C
HP
=10nF
C
HP
=No Capacitor
45
40
35
30
25
20
15
10
5
0
R
TH
= 0
OUTPUT LEVEL (dBV)
OUTPUT LEVEL (dBV)
GAIN (dB)
GAIN (dB)
GAIN (dB)
GAIN (dB)
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