GS3015 Datasheet, PDF (1/5 Pages) Gennum Corporation – V.C. Preamp Hybrid for Class D

FEATURES
• Gennum's GL504 preamp
• mounts on back of Microtronic PJ88S VC Socket
• low external parts count
• designed to drive Class D integrated receivers
• adjustable peak clipper
• low current drain (150 µA) typical
• low noise and distortion
STANDARD PACKAGING
• Hybrid Typical Dimensions
0.192 in x 0.194 in x 0.113 in
(4.88 mm x 4.93 mm x 2.85 mm)
V.C. Preamp Hybrid
for Class D
GS3015 - HYB DATA SHEET
DESCRIPTION
The GS3015 incorporates Gennum's GL504 preamp, three of
the required capacitors and a mid supply referencing 48K
resistor. All that is required for a fully functional hearing aid
system is the addition of a microphone, receiver, volume
control, interstage coupling capacitor and an MPO adjusting
potentiometer.
The GS3015 has been designed to mount on the back of the
Microtronics PJ88S Socket Volume Control. This translates to
a saving in space within the hearing instrument, as the circuitry
mounts directly beneath the volume control. If the VC requires
replacing, it is a simple procedure to remove the defective unit
from the socket and install a new device. This does not disturb
the electronic circuitry.
The major advantage of the GL504 over other preamplifiers is
the electronic MPO adjustment. Since conventional MPO is not
possible in a class D receiver, Gennum provides it in the
preamp.
V_{MIC 2}
R_MIC
C1 6
3µ3
A_IN 11
C2
47n
-A
5
10 V_B
7
4 V_REC
R_PULL
C3
47n
-B
1 B_OUT
8
R1
48K
4
3
12
3
6
57
98
C_IN
CT A_OUT B_IN GND MPO
All resistors in ohms, all capacitors
in farads unless otherwise stated
BLOCK DIAGRAM
GS3015
HYBRID
Revision Date: May 1998
Document No. 520 - 92 - 05
GENNUM CORPORATION P.O. Box 489, Stn. A, Burlington, Ontario, Canada L7R 3Y3 tel. [phone]
Web Site: www.gennum.com E-mail: [e-mail]