
US.
Patent
Jul.
3,
2012
Sheet
6
0f 11
US
8,212,386
B2
216
299
FEEDBACKLOOP
(
100
240
\r
—l
/
VAC
(ISVDC
RECTIFY
&
REC-"FY
&
VARIABLE
-
FILTER
;
INVERTER
;
TRANSFORMER
;
FILTER
>
REGULATOR
6ND
T
Z?Q
Z§Z
2%
_2§_6_
ZLQ
19.5vnc
278
V
3
I
L\
l
294
295
FIG.
6(a)
WEN
SWITCH
299 292
220(a)
I
Z
220(0)
1svnc
1evnc
L
VARIABLE /\
REGULATOR
GND GND
i
.212
19voc
(
\
220(b)
)
7
k
'
294
295 220
EXTERNAL
g
SWITCH
218
222a
299 2?2
2(
)
16vDc(
222(b)
VARlABLE
8
222(0)
REGULATOR
GND
GND
/
219
19vuc(
19vDc
3
\,
L
294
295 222
EXTERNAL
%
FIG-
6(0)
218
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