5
RVC=390k
-5
-15
-25
-35
-45
RVC=0
-55
-65
-75
-140 -120 -100 -80
-60
-40
-20
0
INPUT (dBV)
Fig. 5 Input vs Output as RVC is Varied
(Blocks A to E)
2
0
-2
-4
-6
-8
-10
-12
-14
-16
-18
-20
20
100
1k
FREQUENCY (Hz)
10k 20k
Fig. 7 Frequency Response
(Blocks A to E)
20
18
16
14
12
10
8
6
4
2
0
-90
-88 -86 -84 -82 -80 -78
INPUT (dBV)
-76 -74
Fig. 9 THD vs Input (Blocks A to E)
-10
-20
-30
-40
-50
-60
-70
-80
-90
-100
-140
-120
-100
-80
-60
INPUT (dBV)
-40
-20
Fig. 6 Input vs Output (Telecoil)
2
0
-2
-4
-6
-8
-10
-12
-14
-16
-18
-20
20
100
1k
FREQUENCY (Hz)
Fig. 8 Frequency Response
(Telecoil)
10k 20k
10
9
8
7
6
5
4
3
2
1
0
-70 -66 -62 -58 -54 -50 -46 -42 -38
INPUT (dBV)
Fig.10 THD vs Input (Telecoil)
5
520 - 70 - 05