GS3026 Datasheet, PDF (1/7 Pages) List of Unclassifed Manufacturers – AGC-O in a CIC Size Hybrid

AGC-O in a CIC Size Hybrid
FEATURES
• CIC suitable package size
• 8:1 compression ratio
• 38 dB maximum system gain,
adjustable over a 38 dB range
• output compression threshold,
adjustable over 16 dB range
• designed to drive a class D integrated receiver
• averaging detector
STANDARD PACKAGING
Hybrid typical dimensions:
0.162 in x 0.094 in x 0.070 in
(4.11 mm x 2.39 mm x 1.78 mm)
GS3026 - DATA SHEET
DESCRIPTION
The GS3026 CIC hybrid features AGC-O capability for low
distortion output limiting and offers a package size suitable
for CIC instruments. The circuit consists of a newly designed
AGC preamplifier and output stage, capable of driving the
class D integrated receiver. The compression control
circuit varies the current controlled resistance, connected
between the input and output of the AGC preamplifier. The
compression circuit operates with an 8:1 compression
ratio and uses an averaging detector with a time constant
of 270 ms, selected to provide optimal sound quality over
the full range of sound and listening environments. The
actual attack and release times are typically 40 ms and 150
ms respectively when the circuit is fully in the compression
region of operation (measured times will vary depending
on gain and threshold settings).
The system gain and compression control can be adjusted
by the choice of two independent resistors. Maximum
system gain is 38 dB and it can be adjusted within a 38 dB
range. The output compression threshold can be adjusted
within a 16 dB range.
V_B
1
GS3026
Rvc R_TH
46
C3
0µ15
VREG ₃
C1
0µ1
REG.
8:1
COMPRESSION
CONTROL
C2
IN 2
0µ1
GND 7
-A
12k
RECT.
V_B
48k
C4
B
5 OUT
33n
48k
C5
22n
All resistors in ohms, all capacitors in farads unless otherwise stated.
BLOCK DIAGRAM
Revision Date: July 1998
Document No. 521 - 71 - 02
GENNUM CORPORATION P.O. Box 489, Stn. A, Burlington, Ontario, Canada L7R 3Y3 tel. [phone]
Web Site: www.gennum.com E-mail: [e-mail]