鈥?/div>
6 programmable parameters
38dB maximum system gain
8:1 compression ratio
output compression threshold, adjustable over
22dB range
2nd order active low cut filter adjustable
from 530Hz to 2.0kHz
low frequency boost
1st order high cut filter
programmable or manual volume control
multimemory
averaging detector
DESCRIPTION
The GA3206 programmable hybrid is composed of an AGC
amplifier and the GP523 controller memory chip. The hybrid
features AGC-O capability for low distortion output limiting
and offers a package size suitable for CIC instruments.
The compression circuit operates with an 8:1 compression
ratio and uses an averaging detector with a time constant of
270ms, selected to provide optimal sound quality over a full
range of sound and listening environments. The actual attack
and release times are typically 40ms and 150ms respectively
when the circuit is fully in the compression region of operation
(measured times will vary depending on gain and threshold
settings).
The GA3206 features six programmable parameters: VC
adjustment, threshold adjustment, high and low cut filters,
gain trim and low frequency boost.
Four independent memories add to the flexibility of this
hybrid.
The output stage is designed as a preamplifier for the
class D integrated receiver.
The GA3206 hybrid code programmed into the GP523 is 鈥?鈥?
V
B
2
V
B
SDA
9
SDA
MS
10
MS
VC
8
GA3206
thinSTAX鈩?PACKAGING
Hybrid typical dimensions:
0.195 x 0.110 x 0.070in.
(4.95 x 2.79 x 1.78 mm)
GA3206
R5
92k
SW
R1
64k
C11
0碌15
V
B
V
REG
4
C1
0碌1
C2
R7
460k
0碌1 C3
6n8
C4
15n
RF4B
C5
IN 5
0碌1
800
RF4A
C6 10n
R2
45k5
F
OUT
C7
0碌1
R4
184k
A
IN
A
OUT
C8
22n
R3
185k
GND2
6
All resistors in ohms, all capacitors
in farads, unless otherwise stated.
F
OUT
7
A
IN
GND1
3
GND
RECT
GND
V
REG
8:1
COMPRESSION
CONTROL
80k
V
B
RECT.
12k
-F
-A
B
48k
B
OUT
48k
C10
33n
VB
C9
5n
C12
5n
1 OUT
REGULATOR
R
VC
R
TH
C
AGC
GP523
10k
FIN
R6
185k
R8
92k
Revision Date: June 2001
BLOCK DIAGRAM
Document No. 522 - 46 - 01
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
1
2
3
4
5
6
7
8
