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參數資料
| 型號： | GL504SLT |
| 英文描述： | Hearing Aid Amplifier |
| 中文描述： | 助聽器放大器 |
| 文件頁數： | 1/5頁 |
| 文件大小： | 76K |
| 代理商： | GL504SLT |
A
R
MIC
R
MIC
A
IN
A
OUT
B
IN
MPO
GND
B
OUT
V
B
R
PULL
R
CLIP
6
5
7
8
1
2
3
4
B
BLOCK DIAGRAM
DESCRIPTION
The GL504 is a low current preamplifier designed to drive
the class D series of integrated receivers. This preamp has a
built-in symmetrical peak clipping output limiter, 46 dB of
adjustable gain, and requires few external components.
Composed of two stages, an inverting preamp with gain of
28 dB, and a transconductance block with gain of 18 dB, the
GL504 is easily configured for mid-supply reference as
required by the class D receivers.
The two stages of the GL504 must be AC coupled in order to
maintain the DC bias conditions of each stage. Also, a 48
k
resistor, between the output and ground, is used to keep
the receivers at mid-supply reference. The minimal total parts
count, excluding an MPO variable resistor, requires 3
capacitors, a 100 k
volume control and the 48 k
bias
resistor at the output.
The GL504 is capable of providing a flat frequency response
with very little distortion.
FEATURES
designed to drive class D integrated receivers
MPO range externally adjustable
150
μ
A typical current drain
46 dB of adjustable gain
low external parts count
8 Pin MICROpac
8 Pin PLID
8 Pin SLT
Chip (56 x 56 mils)
Au Bump
STANDARD PACKAGING
Document No. 510 - 99 - 06
GL504 - DATA SHEET
Low Current Preamplifier
with Output Limiting
U.S. Patent No. 07/354,327
Revision Date: May 1998
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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