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GA3203 Datasheet

  • GA3203

  • GA3203 - Programmable DynamEQ? III

  • 382.17KB

  • 9頁

  • ETC

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GA3203 Programmable
DynamEQ III
廬
PRELIMINARY DATA SHEET
FEATURES
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low & high frequency gain adjustment
adjustable high frequency compression ratio
(1:1 to 4:1)
fixed low frequency compression ratio (3:1)
twin average detection鈩?/div>
24dB/octave band split filter
8:1 output compression limiting
notch filter to minimize acoustic feedback
pre & post emphasis circuitry
low level squelch control (1:2 expansion)
multi memory (4)
8 programmable parameters
DESCRIPTION
GA3203
The GA3203 programmable hybrid is composed of a
DynamEQ
廬
III Wide Dynamic Range Compression signal
processor and the GP523 controller memory chip.
The hybrid has 8 programmable parameters including Low
Frequency Gain, High Frequency Gain, High Frequency
Compression Ratio, Band Split Filter Crossover Frequency,
AGC-I Threshold Kneepoint, AGC-O Threshold, Volume Control
and Notch Feedback Control.
The DynamEQ
廬
III includes a squelch circuit which attenuates
microphone and circuit noise in quiet environments and high
gain conditions. It also includes low distortion compression
limiting AGC-O, pre and post emphasis circuitry, and an
acoustic feedback notch filter.
The GA3203 hybrid code programmed into the GP523 is 鈥?鈥?
thinSTAX鈩?PACKAGING
Hybrid typical dimensions:
0.200 x 0.128 x 0.060in.
(5.08 x 3.25 x 1.52mm)
V
B
7
GA3203
R4
184k
C21
8n
C20
10n
C19
100n
R3
185k
R6
185k
R5
92k
C18
100n
GP523
V
REF
V
REG 1
R2
45k5
C1
80n
REGULATOR
FAST
DETECTOR
SLOW
DETECTOR
1
1
X
AGC-O
RECTIFIER
C17
20n
CONTROL
RECTIFIER
X
I REF
R9
18k
C2
8n
Hp
-A
NOTCH
24 dB / Oct
BAND SPLIT
FILTER
Lp
COMPRESSOR
-B
Ragc
-C
Rsquelch
C16
30n
6
OUT
IN
2
C3
80n
SQUELCH
DETECTOR
COMPRESSOR
4
GND
GND
3
SDA
10
MS
5
C4
15n
C6
20n
R7
460k
R1
64k
C13
150n
R8
92k
C14
100n
C15
4n
SW
8
9
All resistors in ohms, all capacitors in farads, unless otherwise stated.
B
IN
B
OUT
BLOCK DIAGRAM
Revision Date: May 2001
Document No. 522 - 13 - 04
GENNUM CORPORATION P Box 489, Stn A, Burlington Ontario, Canada L7R 3Y3 tel. +1 (905) 632-2996
.O.
Web Site: www.gennum.com E-mail: hipinfo@gennum.com

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