HP AC-4A - AC-4 A Decade Counter Block Diagram

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•
•
A.
BLOCK
DIAGRAM
OF
SIMPLE
ELECTRONIC
COUNTER
AMPLITUDE
IN
PUT0--
'
GATE
DISCRIMINATOR
_,.
'I/
AC-4A
AC-4A
AC-4A
AC-4A
J
J
,,
'
'
"-
-
THOUSANDS
HUNDREDS
TENS
UNITS
1\
1"\
I"\
1"\
RESET
Fig.
1.
Block
Diagram
of
Basic
Electronic
Counter
Fig.
1
is
a
block
diagram
of
an
electronic
counter,
which
consists
of
the
following
sections:
AMPLITUDE
DISCRIMINATOR,
which
connects
to
the
INPUT
voltage
to
be
counted.
Fr
om
this
signal
input,
which
m a y
be
a
sine
wave,
square
wave,
or
pulse,
the
Amplitude
Discriminator
develops
the
required
driving
pulse
for
the
first
AC-4A
Decade
Counter.
The
output
pulse
of
the
Amplitude
Dis-
criminator
is
of
the
same
amplitude
and
rise
time
regardless
of
the
amplitude
and
rise
time
of
the
signal
to
the
INPUT.
GATE,
which
in
its
simplest
form
is
an
ON-OFF
switch
connected
between
the
output
of
the
Ampli-
tude
Discriminator
and
the
first
AC-4A
Decade
-1-