AN1139 STMicroelectronics, AN1139 Datasheet - Page 58
AN1139
Manufacturer Part Number
AN1139
Description
L6254 - L6268 - L6269 12V DISK DRIVE POWER COMBO IC
Manufacturer
STMicroelectronics
Datasheet
1.AN1139.pdf
(63 pages)
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AN1139 APPLICATION NOTE
Figure 39b. Mathcad Analisys of the Voice Coil Current Loop
58/64
OPEN LOOP RESPONSE
20 log(
arg(
.
H( ) n
H( ) n
H( ) n
)
.
360
. 2
H1( ) n H2( ) n H3( ) n
)
180
140
100
50
40
30
20
10
100
140
10
20
30
40
50
60
20
0
20
60
10
.
.
100
MAGNITUDE RESPONSE in DB
PHASE RESPONSE in Degrees
1000
H( ) 1
f( ) n
=
949.152
1 10
4
1 10
5
1 10
6
0
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