3
11
S1
C1 2
3µ3
16
+
1-
15
1µ
14
11 - T
1k 10k
9
4
REGULATOR
-A
10 8
7
GP537
GM3008
GS551
-B
5
6
5 -C
2
4
R2
R3
S2 b 13
C2
R1
VIN
(0V AC)
a
10
47n
18k2
12
105k
20k
R5
R4 15k
60k
C3 47n
17
18
7
9
8
6
5
RF=390k
All resistors in ohms, all capacitors
in farads unless otherwise stated.
Fig. 1 Production Test Circuit
6
1
-D
E
REFERENCE
VOLTAGE
9
7
10
83
C4
47n
C5
47n
1
1.3 VDC
4
ITRANS
3
IAMP+ITCOIL
2
VOUT
390
3
11
C1
2
3µ3
16
+
1-
15
14
11 - T
4
REGULATOR
GP537
GM3008
GS551
5 -C
-A
-B
5
10k
9
10 8
7
6
2
4
13
10
MIC
12
EK3024
R2
R3
C2
R1
47n 18k2
105k
20k
R5
60k
R4 15k
C3 47n
17
18
7
9
8
6
5
390k
All resistors in ohms, all capacitors
in farads unless otherwise stated.
V.C.
Fig. 2 Typical Hearing Instrument Application
1.3VDC
6
-D
REFERENCE
VOLTAGE
9
7
1
E
10
83
C4
47n
C5
47n
1
4
3
REC
2
CI2960
3
520 - 70 - 05