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GC570 Datasheet

  • GC570

  • GC570 - DynamEQ? II WDRC IC

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  • ETC

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DynamEQ
廬
II
WDRC IC
GB570/GC570 - DATA SHEET
FEATURES
鈥?dual channel signal processing
鈥?2nd (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?handles high input levels
鈥?low THD and IMD distortion
鈥?drives class D integrated receivers
鈥?MPO range externally adjustable
PACKAGING
鈥?/div>
Chip
Au Bump
DEVICE DESCRIPTION
The DynamEQ
廬
II product family is a second generation Wide
Dynamic Range Compression (WDRC) system.
GB570 (GC570) incorporates 12 dB/oct (24 dB/oct) filtering
and is designed to accommodate CIC and ITC size
requirements.
The gain and frequency response is dependant on the user鈥檚
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 12 dB/oct (24 dB/oct) band split filter ahead of the
expander/compressor circuits allows for independent
compression ratio adjustment (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.
V
B
18
C
SAD
7
1M
C
FAD
2
1M
FAST
AVERAGE
DETECTOR
1:1
1
2:1
6
4:1
5
R
HI
4
R
LO
3
V
REG
8
REGULATOR
SLOW
AVERAGE
DETECTOR
85k6
42k8
GB570
GC570
R
TH
19
50k
1
CONTROL
RAGC_IN
R
H
48k
OUT
RECTIFIER
X
V
B
11
IN
10k
-A
12 dB / Oct
(24 dB / Oct)
BAND SPLIT
FILTER
High Frequency
Expander / Compressor
R
L
Low Frequency
Expander / Compressor
-B
-C
20
48k
8k4
9
GND
10
All resistors in ohms, all capacitors
in microfarads, unless otherwise stated
12k
12
A
OUT
REG
IN
13
14k
14
R
茠c
16
F
OUT
B
IN
17
B
OUT
15
MPO
FUNCTIONAL BLOCK DIAGRAM
Document No. 521 - 99 - 00
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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  • 英文版
    GC570 - DynamEQ? II WDRC IC
    ETC

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