Table of Contents
Advertisement
PR-82810-A
divide circuits
2-с Equalizing pulse eliminator cireuit
When
the synchronizing
signal separated fro:
the reproduced
videu signal in the V-DEM
is ар
plied io pin 14,
equalizing pulse is eliminated
bv
operation
of
а
mono-stable
muitivibrator
vireuit.
Sampling pulse generator
2-e V-COM
22
pulse with approximately
9H width by C402 and
R405. And this pulse is applied to pin 30 of 2403
ма Q403 and used to obtain the sampling pulse in
this ЭН interval. That pulse with ӘП width is also
used
as switehing
pulse.
When
the Q411
FET
is
switched off by this pulse, the voltage correspond-
ing to the time difference between
the sampling
pulse and ММУ 2 output is held by C415.
The hold
voltage
controls
MMV3
output
pulse
width
ма
0418
and
Q414.
thereby
ihe sampling
pulse is
generated at the aceurate time.
SES
|
mna
i
|
—
СЙ
^ пл
oe
E
B
1
'
|
as
ل
ا
- -
ا
NICK
a.
ey
PRT
gia
s
ғ
5
мәз?
|
{
|
|
ا
ي ل
ا ط
с в
21
a
авч
,
BURST
и
\
GATE PULSE
\
rasv
2
BURST
MMV
3
~ |
,
27
|
SAMPLING
|
|
Е
PULSE
T
725
10
9
2fH
-
29V
Ма
p raver
ZUM
— —
33V
SINE
1
WAVE
Fig. 18
Waveforms on UA5003
Advertisement
Table of Contents
