GS3021 データシートの表示（PDF） - Gennum -> Semtech
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GS3021 Datasheet PDF : 7 Pages
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DynamEQ® I
Dynamic Equalizer - Class D
FEATURES
• designed to drive class D integrated receivers
• handles high input levels (up to 100 mVRMS) cleanly
• low THD and IMD distortion
• unique twin average detectors
• dual channel signal processing
• adjustable AGC threshold levels
• MPO range externally adjustable
• highpass filter with adjustable corner frequency
• 2:1 compression of high frequencies
• no external capacitors or resistors required
• 30% smaller by volume than DynamEQ® I (GS3011)
STANDARD PACKAGING
• 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)
VB
5
C7
2µ2
DESCRIPTION
GS3021 - DATA SHEET
The DynamEQ® 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® 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 fixed gain stage with MPO
control designed to drive class D integrated receivers.
C6
0µ1
VREG 10
C1
2µ2
RTH 1
CHP 11
C2
IN 9
3n9
REGULATOR
100k
SLOW
AVERAGE
DETECTOR
100k
FAST
AVERAGE
DETECTOR
R1
CURRENT
REFERENCE
2:1
COMPRESSION
CONTROL
RECTIFIER
68k
12k
-A
-C
C3
0µ1
MGND 8
GND 4
R2
-B
50k
50k 50k
50k
C5
C4 0µ1
0µ1
7
All resistors in ohms, all capacitors in farads unless otherwise stated.
Patent Pending.
CIN
FUNCTIONAL BLOCK DIAGRAM
VB
48k
D
3 OUT
48k
2 MPO
GS3021
6
COUT
Revision Date: May 1998
Document No. 521 - 06 - 03
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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