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器件描述：FRONTWAVE-TM Multi-Microphone Hybrid
器件厂商：GENNUM [Gennum Corporation]
厂商主页：http://www.gennum.com
文件大小：112.49KB
文件页数：6
PDF阅读：GA3205.pdf (点击阅读器件资料)
摘要：
thinSTAX? PACKAGING
Hybrid Typical Dimensions:
0.205 x 0.110 x 0.060in.
(5.21 x 2.79 x 1.52mm)
PRELIMINARY DATA SHEET
BLOCK DIAGRAM
DESCRIPTION
The GA3205 is a multi-memory hybrid that, with the addition of
two microphones, can be used to produce a directional
response in any hearing aid. The four available memories can
be programmed to include any of the 4 modes of operation: 1
mic omnidirectional, 2 mic omnidirectional, directional, and
directional equalized. The variable time delay of the circuit
gives it the flexibility to offer a wide range of directivity patterns
(ie. cardioid to hypercardioid) for microphone port spacings
from 6mm to 13mm. Variable low frequency equalization
gives the flexibility to trade-off between bass response and
noise performance.
Calibration software automatically configures the hybrid for
the desired directivity pattern and adjusts the gain trim resistors
to compensate for micropohone sensitivity mismatches
enabling maximum directivity.
The GA3205 hybrid code programmed into the GP523 is "2".
FEATURES
? 4 different modes of operation:
? directional
? directional equalized
? 1 mic omnidirectional
? 2 mic omnidirectional
? allows for mic port spacing from 6mm to 13mm
? calibration software automatically trims out mic
sensitivity mismatches
? variable time delay/directivity pattern
? 4 memories
? variable low frequency equalization (0 to 20dB)
? small package size
? compatible with all hearing aids
Revision Date: September 1999
FRONT
MIC
REAR
MIC
GND1
GND2
OUT
V
B
C4
100n
C1
200n
C2
200n
10k
15k5
3k9
GA3205
10k
15k5
R7
460k
36k
R8
92k
R3
185k
R6
185k
C6
4n4
R9
18k
R4
184k
C5
1n2
R2 45k5
R5
92K
16k
11k25k6k
6k
26k
26k
24k
SW
GP523
810
C3
100n
VREG1 VREG2
SDA MS
All resistors in ohms, all capacitors in farads unless otherwise stated.
6
7
12
1
4
2511
-D
-B
-A
-C
REGULATOR
Document No. 522 - 18 - 01
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
GA3205
FRONTWAVE
?
Multi-Microphone
Hybrid - GA3205
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