鈥?/div>
adjustable AGC threshold levels
highpass filter with adjustable corner frequency
2:1 compression of high frequencies
no external capacitors or resistors required
DESCRIPTION
The DynamEQ
廬
I hybrid is a dynamically adaptive loudness
growth equalizer. Its gain and frequency response is
dependent on the user's environment, and is designed for
level dependant frequency response providing treble
increase at low levels (TILL). The unique twin averaging
detector circuit dramatically reduces pumping effects and
is optimized for mild to moderate hearing loss.
DynamEQ
廬
I has two signal paths for dual channel processing
incorporating 4 amplifying stages ( A, B, C, D ) and the
AGC processing circuit.
Stage A is a highpass channel with 2:1 compression,
Stage B is a wideband unity gain buffer. The sum of the two
paths gives a high frequency boost to low level signals,
which gradually compresses to a flat response at high
input levels. Stage C is used for volume control adjustment,
while stage D is a class A power amplifier with receiver
bias current adjustment.
鈥?30% smaller by volume than DynamEQ
廬
I GS3011
STANDARD PACKAGING
鈥?Hybrid Typical Dimensions
0.250 in x 0.115 in x 0.115 in
(6.35 mm x 2.92 mm x 2.92 mm)
V
B
5
C7
2碌2
C6
0碌1
100k
V
REG
10
C1
2碌2
R
TH
1
R1
68k
C
HP
11
C2
IN
9
100k
FAST
AVERAGE
DETECTOR
REGULATOR
SLOW
AVERAGE
DETECTOR
CURRENT
REFERENCE
2:1
COMPRESSION
CONTROL
RECTIFIER
VB
24k
12k
-A
3
3n9
-C
OUT
D
2
11 R
E
515
C3
0碌1
MGND
8
R2
50k
-B
50k
50k
50k
1k
GND
4
C4
0碌1
C5
0碌1
GS3020
7
6
All resistors in ohms, all capacitors in farads unless otherwise stated.
Patent Pending.
C
IN
C
OUT
FUNCTIONAL BLOCK DIAGRAM
Revision Date: May 1998
Document No. 521 - 05 - 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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