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GA3202 Datasheet

  • GA3202

  • GA3202 - DynamEQ? II WDRC System

  • 7頁(yè)

  • ETC

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DynamEQ
廬
II
WDRC System - GA3202
DATA SHEET
FEATURES
鈥?dual channel signal processing
鈥?reflowable hybrid
鈥?4th order state variable filter
鈥?adjustable crossover frequency
鈥?adjustable compression ratio from 1:1 to 4:1
鈥?independent compression ratio adjustment for
low and high frequency band
鈥?adjustable AGC threshold levels
鈥?unique twin average detectors
鈥?> 95dB dynamic range
鈥?low THD and IMD distortion
鈥?drives class D integrated receivers
鈥?MPO range externally adjustable
thinSTAX
鈩?/div>
PACKAGING
DEVICE DESCRIPTION
The DynamEQ
廬
II hybrid family is a second generation Wide
Dynamic Range Compression (WDRC) system.
The small hybrid design makes it particularly suitable for
CIC applications. GA3202 hybrid incorporates 24dB/oct
filtering. The gain and frequency response is dependant on
the user's environment.
Twin averaging detector circuits are optimized for sound
quality during normal listening, without sacrificing comfort
during sudden loud inputs.
All input signals to DynamEQ
廬
II are processed by 2:1
compression before subsequent band splitting.
The 24 dB/oct band split filter ahead of the expander/
compressor circuits allows for independent compression ratio
adjustments (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.
The GA3202 is designed as a CIC alternative to GS3032,
GR3032 and GS3028 with MPO adjustment range modifications.
V
B
8
R
HI
13
R
LO
2
GA3202
Hybrid Typical Dimensions:
0.190 x 0.105 x 0.050in.
(4.83 x 2.67 x 1.27mm)
1:1
1
2:1
15
4:1
14
GA3202
C8
8n5
V
BA
T
C5
8n
C14
7n4
C
FAD
1M
V
REG
3
R2
10
12k
37k
R1
C2
IN 4
81n
GND 5
IN
-A
10k
12k
GND
A
OUT
REC
C3
80n
R3
198k
All resistors in ohms, all capacitors in farads, unless otherwise stated.
Patent Pending
REGULATOR
FAST
AVERAGE
DETECTOR
C6
83n
C
SAD
V
REF
2M
SLOW
AVERAGE
DETECTOR
1:1
2:1
4:1
R
HI
R
LO
85k6
C1 V
REG
81n
42k8
R
TH
CONTROL
R
TH
3k3
RAGC_IN
RECT.
1
X
VB
48k
-B
-C
OUT C4
92n
RL
Low Frequency
Exp'der / Comp'r
F
OUT
B
IN
C7
0碌14
B
OUT
48k
11k
MPO
6 MPO
R4
100k
7 OUT
24 dB / Oct
BAND SPLIT
FILTER
RH
High Frequency
Exp'der / Comp'r
R
FC
13k1
9
R茠
C
11
B
IN
12
B
OUT
Revision Date: March 2001
BLOCK DIAGRAM
Document No. 521 - 91 - 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

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