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Figure 1-16 illustrates the actuator drive circuits_ The actuator driver receives Vi input from the compensator.
The voltage converts to current 10 according to 10
=
-2Vi- V
REF
equals +6V, which goes to the + input of the
TDA2030 power op amp_ Because of the high gain the input of the TDA2030 also equals + 6V_
V.
I
FROM
COMPENSATOR
R88
100K
+24V
NOT ON PCB
REF ONLY
-
-
R89
100K
CR6
CR7
IN 4002
68
1W
20.V
R91
V
1
C
V
...---------'V\iO"'--------..... -
V
0
=
Vi
R97
100K
+24V
R96
100K
SWITCHED
+12V
-+--.,
SWITCHED
-5V
-Vi
CRB
10
IN 4002
I
+
.I..
1
I
4.~
-
- I
100K
68
R94
10
19,UrQ:- _ . - - _
I~V
If
I
L_IL.·_
9
J
ACTUATOR COIL
NOT ON PCB
FIGURE 1-16
ACTUATOR DRIVE CIRCUITS
1-17
21,W
REV A
(01/84)
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