Philips PM2517E - Page 57

3.4.5.
OO 0060 Switching
part
of the
ADC
3.4.5.1.
General
The Oe
0060 converts
the current
difference
from the OO
0064
(V-l
convertor)
to a
digital output
signal
with
a dutytYcle
depending
on
the input
voltage of
the
ADC.
It
generates the clock
for the digital
section
of the
PN,4
2517:
this clock-frequency
is determined
by external
capacitors.
I
r;
_
r;
_
[,,
-
t',_-
(-8.5v
)
CLOCK
N,C
C clock
[,.
t
t_
t
C comp
c"o
$
NC
NC
DATA
N.C
(r8.5v
)
N.C
NC
vdd
Vss
GND
+8.5V
-8.5V
cLocK &
5WITCHING