GM3038 Datasheet, PDF (1/8 Pages) Gennum Corporation – Programmable DynamEQII

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.
V_{REG 7}
C1
0µ1
V_B
1
C6 C5
V_DD
0µ22 _10n
R5S R5R
R5
V_B
C_SAD
C_FAD
1:1A 1:1B ^1MΩ 4:1
18
7 _1M
2 1M
16
5
V_REG 8 _REGULATOR
SLOW
AVERAGE
DETECTOR
53.5kΩ
FAST
AVERAGE
DETECTOR
85.6kΩ
R6R
R6S
R6
R_HI R_LO
4
3
600kΩ
GM3038
ER102
R_{TH 19}
R3R
50k
R3
C2
IN 6
0µ2
150kΩ
11
10k
IN
CONTROL
R
AGC_IN
-A
GND 8
V_SS
9
GND
SDA 5
SDA
10
A_OUT
Patent pending
All resistors in ohms, all capacitors in farads
unless otherwise stated.
1
RECTIFIER
X
V_B
12k
12
REC
C3
0µ1
24 dB / Oct
BAND SPLIT
FILTER
14k
13
R_FC
R_H
High Frequency
Expander / Compressor
RL
Low Frequency
Expander / Compressor
R4
300kΩ
14
F_OUT
48k
OUT ^C4
-B
-C
20
2 ^OUT
0µ1
48k
8k4
16
17
B_IN
B_OUT
15 ^MPO
R2R
R2
150kΩ
R4R
C7
0µ22
4
B_IN
3
B_OUT
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. [phone]
Web Site: www.gennum.com E-mail: [e-mail]