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PDF GM3038 Data sheet ( Hoja de datos )

Número de pieza GM3038
Descripción Programmable DynamEQII
Fabricantes Gennum Corporation 
Logotipo Gennum Corporation Logotipo



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Programmable
DynamEQ®II - GM3038
DATA SHEET
FEATURES
• DynamEQ® II flexibility
five programmable parameters
24 dB/oct state variable filter
twin average detectors
handles high input levels
drives class D integrated receivers
STANDARD PACKAGING
Hybrid typical dimensions:
0.250 in x 0.115 in x 0.120 in
(6.35 mm x 2.92 mm x 3.05 mm)
DESCRIPTION
The GM3038 programmable hybrid is composed of a
DynamEQ® II Wide Dynamic Range Compression signal
processor and the ER102 controller memory chip. The
hybrid incorporates 24 dB/oct filtering.
The gain and frequency response are dependent on the user’s
environment. The Twin Average Detector circuit is optimized
for sound quality during normal listening without sacrificing
comfort during sudden loud sounds.
The GM3038 features five programmable parameters:
independent compression ratio adjustment in the High and
Low frequency channels, threshold adjustment, crossover
frequency adjustment and MPO adjustment.
The ER102 controller memory chip is supported by a variety
of programmers available on the market.
The output stage is designed as a preamplifier for the class D
integrated receiver.
VREG 7
C1
0µ1
VB
1 C6 C5
VDD 0µ22 10n
R5S R5R
R5
VB CSAD
CFAD
1:1A 1:1B 1M4:1
18
7 1M
2 1M
16
5
VREG 8 REGULATOR
SLOW
AVERAGE
DETECTOR
53.5k
FAST
AVERAGE
DETECTOR
85.6k
R6R R6S
R6
RHI RLO
43
600k
GM3038
ER102
RTH 19
R3R
R3
50k
IN 6
C2
0µ2
150k
11
IN
10k
CONTROL
R
AGC_IN
-A
GND 8
VSS 9
GND
SDA 5
SDA
10
AOUT
Patent pending
All resistors in ohms, all capacitors in farads
unless otherwise stated.
RECTIFIER
1
X
VB
12k
12
REC
C3
0µ1
24 dB / Oct
BAND SPLIT
FILTER
14k
13
RFC
RH
High Frequency
Expander / Compressor
RL
Low Frequency
Expander / Compressor
R4
300k
14
FOUT
48k
OUT C4
- B - C 20
2 OUT
0µ1
48k
8k4
16 17
BIN BOUT
15 MPO
R2
150k
R2R
R4R
C7
0µ22
4
BIN
3
BOUT
BLOCK DIAGRAM
Revision Date: August 1999
Document No. 521 - 62 - 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: [email protected]

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GM3038 pdf
RECEIVER 2µ2
MICROPHONE
+
TO PROGRAMMER
BATTERY
+
VOLUME
CONTROL
TYPICAL PERFORMANCE CURVES
Fig. 4 Typical Assembly Diagram
-20 ƒ = 1kHz
R4 - set 15
-30
R5 - set 0
-40
-50
-60
-70
-80
-90
-100 -90
R5 - set 31
Used
Settings
0
9
12
14
16
17
18
19
20
21
23
24
26
28
30
31
- 80 -70 -60 -50 -40 -30 -20
INPUT LEVEL (dBV)
Fig. 5 I/O Transfer Function for Different Compression Ratios
(High Frequency Channel)
48
44 VIN = -80dBV
40
36
32
28
24
20
16
12
8
4
0
0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 31
R5 RESISTOR SET ON ER102 DIE
(set 0 - short, set 31- open)
Fig. 6 High Frequency Gain (Compression Ratio Adjustment)
-20
ƒ = 1kHz
R4 - set 0
-30
R6 - set 0
-40
-50
-60
R6 - set 15
-70
-80
-90
-100 -90
-80 -70 -60 -50 -40
INPUT LEVEL (dBV)
-30 -20
Fig. 7 I/O Transfer Function for Different Compression Ratios
(Low Frequency Channel)
48
44 VIN = -80dBV
40
36
32
28
24
20
16
12
8
4
0
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
R6 RESISTOR SET ON ER102 DIE
(set 0 - short, set 15- open)
Fig. 8 Low Frequency Gain (Compression Ratio Adjustment)
5 521 - 62 - 04

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