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DynamEQ(R) I Dynamic Equalizer
GS3020 - DATA SHEET
FEATURES * handles high input levels (up to 100 mVRMS) 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 DESCRIPTION The DynamEQ (R) 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(R) 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.
* 30% smaller by volume than DynamEQ(R) 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)
VB
5
C7 22
C6 01
100k VREG 10 C1 22 RTH 1 R1 68k CHP 11 C2 IN
9
100k FAST AVERAGE DETECTOR
REGULATOR
SLOW AVERAGE DETECTOR
CURRENT REFERENCE
2:1 COMPRESSION CONTROL
RECTIFIER VB 24k
12k
-A
3
3n9
-C
OUT
D
2 11 RE
515
C3 01 MGND 8
R2 50k
-B
50k 50k 50k
1k
GND 4 C4 01
C5 01 GS3020
7 6
All resistors in ohms, all capacitors in farads unless otherwise stated. Patent Pending.
CIN
COUT
FUNCTIONAL BLOCK DIAGRAM
Revision Date: May 1998 Document No. 521 - 05 - 04
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 -20 C to 70 C GND CAUTION CLASS 1 ESD SENSITIVITY OUT
3 4
PAD CONNECTION
RTH RE
1 2 11
CHP
5
6
7
8
9
10
VREG
VB COUT CIN MGND IN
ELECTRICAL CHARACTERISTICS
Conditions: Input Level VIN = -97 dBV, Frequency = 5 kHz, Temperature = 25C, Supply Voltage V B = 1.3 V
PARAMETER Hybrid Current Minimum Voltage Total Harmonic Distortion Input Referred Noise Total System Gain AGC Compression Ratio Threshold Compression Gain Range High Pass Corner Frequency System Gain in Compression OUTPUT STAGE Minimum Transducer Current Maximum Current Sink Output Impedance RE Voltage REGULATOR Regulator Voltage
SYMBOL I AMP VB THD IRN AV COMP
CONDITIONS VIN = 0VRMS RVC= 15k; VIN= -40dBV at1kHz NFB 0.2 to 10kHz at 12dB/oct
MIN 90 1.1 52.5
TYP 190 0.1 2.5 55.5
MAX 300 1 58.5
UNITS A V % VRMS dB
VIN= -60dBV & -80dBV, RVC= 15k RVC= 15k; Note 1 CHP - Not Connected VIN = -80dBV RE - Not Connected
1.74:1 -
1.95:1 -94 28 3.4 47
2.11:1 49
Ratio dBV dB kHz dB
ARANGE HPC A80 I TR I SINK ZOUT VRE VREG
26 45
130 3 20 52
160 6 24 56
190 28 60
A mA k mV
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) Notes: 1. ARANGE = V P3 [VIN = -97dBV] - V P3 [VIN = -20 dBV] + 77dBV
521 - 05 - 04
2
1.3V
5
C7 22
C6 01
100k
10
100k FAST AVERAGE DETECTOR
REGULATOR C1 22
SLOW AVERAGE DETECTOR
1
CURRENT REFERENCE R1 68k
2:1 COMPRESSION CONTROL
RECTIFIER VB 24k
1.3V
CHP 01
11
1k
3
C2
9
12k
-A
-C D
3n9 3k9 C3 VIN
8
11 2 R2 50k
-B
50k 50k 50k
1k
515
01
RE 100
4
C5 C4 01
7 6
01 GS3020
RVC
All resistors in ohms, all capacitors in farads unless otherwise stated.
100K
Fig.1 Production Test Circuit
1.3V
5
C7 22
C6 01
100k
10
100k FAST AVERAGE DETECTOR 1.3V RECTIFIER VB 24k ED1913 or MODEL 2313
3
REGULATOR C1 22
SLOW AVERAGE DETECTOR
1
CURRENT REFERENCE R1 68k
2:1 COMPRESSION CONTROL
11
EK3024 or MODEL 39
C2
9
12k
-A
-C D
3n9
11 2 C3 01 MGND
8
R2 50k
-B
50k 50k 50k
1k
515
RE 100
4
C5 C4 01 01
7 6
GS3020
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.
RVC 100k
Fig. 2 Example of Hearing Instrument Application
3
521 - 05 - 04
VOLUME CONTROL + EK3024 or MODEL 39 9 8 7 6 5 4
Microphones and receivers shown above are for illustrative purposes only. Manufacturers can design with other appropriate transducers.
10 1
BATTERY ED1913 or MODEL 2313 3 2 1 100
C6 01 100k FAST AVERAGE DETECTOR RECTIFIER VB 24k
10
11
Fig. 3 Example of Assembly Diagram
1.3V
5
C7 22
100k REGULATOR C1 22 SLOW AVERAGE DETECTOR
RTH=
CHP (Normally not connected) 11
CURRENT REFERENCE R1 68k
2:1 COMPRESSION CONTROL
C2
9
12k
-A
-C D
3n9 3k9 C3 VIN
8
R2 50k
-B
50k 50k 50k
01
4
C5 C4 01
7 6
01 GS3020
All resistors in ohms, all capacitors in farads unless otherwise stated.
RVC 15k
Fig. 4 Characterization Circuit (used to generate typical curves)
521 - 05 - 04
4
+
+
MIC
REC
2.6V 1k82
3
11 2 1k
515
RE 100
45 VIN=-96dBV 40 35 30 VIN=-88dBV
0 -10 1kHz
OUTPUT LEVEL (dBV)
VIN=-80dBV
-20 2kHz -30 -40 -50 -60 -70 -80 -100 RTH = 0 1kHz 2kHz 5kHz RTH = 5kHz
GAIN (dB)
25 20 15
VIN=-60dBV
VIN=-40dBV VIN=-20dBV
10 5 0 20 100 1k 10k 20k
-90
-80
-70
-60
-50
-40
-30
-20
-10
FREQUENCY (Hz)
INPUT LEVEL (dBV)
Fig. 5 Frequency Response for Different Input Levels
Fig. 6 I/O Transfer Function for Different Test Frequencies. Shown for Min/Max RTH Resistors Values
45 40 35 RVC=47k 30 VIN = -50dBV
45 RVC=100k 40 35 30 RVC=22k
VIN=-96dBV
CHP=100nF CHP=68nF CHP=33nF CHP=10nF CHP=No Capacitor
GAIN (dB)
25 20
GAIN (dB)
25 20 15 10 5
RVC=15k 15 10 5 0 20 100 1k 10k 20k
VIN=-20dBV
0 20 100 1k 10k 20k
FREQUENCY (Hz)
FREQUENCY (Hz)
Fig. 7 Frequency Response for Different RVC Values
Fig. 8 Corner Frequency vs C HP Capacitor Value
0 -10 = 5kHz
45 40 35 30 RTH = = 100k = 47k = 22k =0 25 20 15 10 5 0 20 VIN=-96dBV
OUTPUT LEVEL (dBV)
-20
-40 RTH = 0 -50 -60 -70 -80 -100 22k 47k 100k RTH =
-90
-80
-70
-60
-50
-40
-30
-20
-10
GAIN (dB)
-30
100
1k
10k
20k
INPUT LEVEL (dBV)
FREQUENCY (Hz)
Fig. 9 I/O Transfer Function for Different RTH Resistors
Fig. 10 Frequency Characteristics for Different RTH Values
5
521 - 05 - 04
10 = 5kHz No Capacitor
1
THD & NOISE (%)
1
VIN=-40dBV =200Hz
CHP =0.1F
IMD (%)
0.1 No Capacitor
CHP=0.1F 0.1
0.01 -90 -80 -70 -60 -50 -40 -30 -20
0.01 1k 10k 100k
INPUT LEVEL (dBV)
FREQUENCY (Hz)
Fig. 11 THD & Noise vs Input Level
Fig. 12 Intermodulation Distortion (CCIF) vs Frequency
0.250 (6.35)
0.115 (2.92)
GS3020
XXXXXX
0.125 MAX (3.18)
1 C7 2 C1
11
3
4
5
6
7
8
9
10
Dimension units are in inches. Dimensions in parenthesis are in millimetres converted from inches and include minor rounding errors. 1.0000 inches = 25.400 mm. Dimension 0.005 (+0.13) unless otherwise stated. Pad numbers for illustration purposes only. Smallest pad 0.020 x 0.027 (0.51 x 0.69) Largest pad 0.025 x 0.041 (0.64 x 1.04) XXXXXX - work order number. This hybrid is designed for point to point manual soldering.
Fig. 13 Hybrid Layout & Dimensions
DOCUMENT IDENTIFICATION: DATA SHEET The product is in production. Gennum reserves the right to make changes at any time to improve reliability, function or design, in order to provide the best product possible. REVISION NOTES:
Updated to Data sheet
Gennum Corporation assumes no responsibility for the use of any circuits described herein and makes no representations that they are free from patent infringement. (c) Copyright December 1993 Gennum Corporation. All rights reserved.
Printed in Canada.
521 - 05 - 04
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