ES
EST
FT
4110900/6
INTER
interEST
OPERATING
IN
GENERAL
There
(channels
are
PF
ERENCE
two
1
and
£572
DESCRIPTION
galvanically
II)
in'the
-
THERAPY
2
0
separated
interference
escotek
UNIT
current
therapy
driven
unit.
The
ky
1/11
outputs
output
|
|
|
of
the
output
3800-4000
impedance
intensity
electrode
and
positive
Sinusoidal
negative
The
are
of
the
time
TIME-bushbuttons
and
channel
current
therapy
the
intensities
indicated
are
seting
output
polarity
polarity
display.
selected
Hz
is
of
output
the
II
frequency
with
1
ohm
the
is
current
of
by
the
The
by
control
treatment
is
constant
an
(outputs
output
used
is
currents
is
used
the
current
treatment
thumbwheel
of
the
incremento
current
the
currents
comes
used
are
the
output
meter
the
time
4000
channel
of
in
short
from
the
polarity,
negative
cut
positive
currents
and
program
switches.
(see
Hz
is
off.
sinusoidal
J]
0,2
circuit),
100
are
the
halfwaves
and
the
or
starting
user's
can
added
channel
Analogously
the
POLARITY-,
be
Hz.
mA.
halfwaves
the
treatment
wanted
When
inside
treatment
manual
current.
programmed
the
the
When
I.
When
when
are
the
cut
time
treatment
START-
treatment
maximum
the
the
of
clock
of
The
to
load
two
unit
the
the
the
off.
time
and
the
|
|
]
interference
OPERATING
The
fig.
Components
in
block
3A10900
figures
therapy
DESCRIPTION
diagram
and
layouts
16109060
of
the
for
and
unit
the
schematic
4X10900).
interference
PC-boards
2C10901.
diagram
1F10900
therapy
is
shown
and
unit
in
fig.
2F10901
is
are
shown
1810900.
shown
in
a
|
‘11090078
escotek
ky
2/11
ikm
시이
이이
The
diodebridges
regulation
PC-boards
galvanic
supply
voltage
by
and
channel
The
loop
controlled
consists
frequency
power
voltage
for
the
91V
transistor
II
frequency
circuit
supply
circuits
are
isolation
the
regulation
is
regulated
IC3
oscillator.
of
resistors
range
of
(D1-D12),
generated
for the
output
01.
of
the
consisting
of
the
the
(71,02,22,03).
between
unit
DY
by
separate
both
amplifier
circuit
the
Analogously
by
the
channel
The
R/
an
oscillator
I
of
passive
R10
consists
regulators
Supply
regulators.
outputs
output
of
the
consisting
the
equal
is
a
circuit
generated
phase-comparator
low-pass-filter
and
cpacitors
is
controlled
of
(IC1,1C2)
voltages
there
amplifiers.
channel
of
supply
(72,03).
a
transformer
the
voltage
by
a
C2/
by
and
for
Because
is
J]
zenerdiode
a
The
is
regulated
the
separate
for
phase-locked-
and
a
of
the
and
C28.
resistors
TI,
91V
both
of
the
supply
the
voltage
loop
The
-一
71
Rd
and
of
divider
output
phase-comparator.
generated
frequency
can
even
corresbonding
Hz
Hz.
when
from
R9
the
164
with
be
total
are
By
reference
N=4866
the
and
loop
(point
4864
changing
capacitors
N
of
by
f
a
divider
written
frequency
former
and
operates
the
3)
the
of
the
an
number.
values
5120.
the
the
output
value
the
counter
of
the
The
first
oscillator
64.
expression
of
When
divider
49,995
C29
second
is
timer
other
counter
For
When
N
frequency
3801,6
and
controlled
input
the
{
for
the
N=4866
of
Hz
Hz).
(30.
works
is
output
f
-80,000
the
(=1MHz/20002)
As
counter
as
frequency
of
the
divided
frequency
=(N
the
x
frequencies
output
first
is
3801,2
Analogously
the
of
by
the
timer
f
Hz
progranmable
the
the
other
f
by
a
)/64,
(=1MHz/20000)
frequency
counter
is
Hz
by
timer
program
input
(point
1019.
counter
of
the
where
3800
for
generated.
(differs
using
1619.
The
channel
Hz
20002,
divider
and
of
2)
output
circuit
N
is
and
is
4000
3801,
0,4
dividers
The
the
the
is
an
the
6
the
Now
Hz
|
20004
frequencies
be
frequencies
changed
and
changed
with
20006
49,990
with
with
steps
for
Hz
steps
steps
of
generating
and
of
0,2
0,4
of
49,985
10
Hz.
Hz.
ms
The
reference
Hz),
By
changing
the
frequency
the
output
frequency
output
adjacent
frequency
range
(reference
frequency
of
the
reference
can
voltage
can
be
EST
ST
4110900/E
escotek
ky
3/11
controlled
x
64...4000Hz
controlled
C30
connected
The
output
the
frequencies
9)
transistor
connected
the
the
The
counter
of
a
INTERFERENCE
difference
two
5V
oscillator
oscillator
in
frequency
3
(interference
D-flipflop
Q40
FREQUENCY.
via
electrode
square
x
of
the
is
signals
has
64).
parallel
of
the
1013.
the
needed
therapy
blinking
PIA-circuit
to
The
is
adjusted
with
the
timer
frequency)
This
Futuremore
for
is
of
be
at
frequency
a
capacitor
channel
IC19.
difference
of
IC15
calculating
used.
the
both
least
for
II
The
comes
the
the
to
243,2...256
range
suitable
C29.
(point
difference
frequency
green
difference
the
microprocessor,
the
channels
from
output
of
by
5) is
the
indicator
are
kHz
the
a
generated
of
the
output
controls
frequency
current
supplied
(3800Hz
voltage
capacitor
output
(pin
by
LD 1 ,
where
when
by
a
is
to
binary
control
different
precision
in
parallel
attenuatin
are
electrode
CMOS
adjusted
The
Sinusoidal
the
maximum
the
used
-switches
square
channel
point
controlled
words
values
resistors
by
value.
to
therapy
are
to
about
signals
by
a
1
(about
9
(frequency
attenuators
coming
of
from
attenuation
(R11...R16
CMOS-analogy-switches
These
rotate
is
ON
0,9V
of
band-pass-filters
is
3950
0,6V
the
used
the
PP
Hz
)
by
constant
attenuators
interference
(see
level
the
the
RT2.
(IC8).
the
and
the
points
level
The
4000
By
PIA-circuit
can
be
R19...R24)
(1C5...1C/7)
controlled
vector
user's
of
the
6
and
(1C8).
in
point
level
Hz)
the
chosen.
manual).
points
7
When
of
is
adjusted
aid
IC15,
Binary
connected
controls
by
when
6
are
the
8
is
the
channel
of
6
64
suitable
the
When
filtered
frequency
adjusted
the
and
to
program
all
maximum
bits
(=2°)
coded
the
four
the
7
are
II
to
of
to
in
(about
The
control
adjustable
adjusted
tandem
0,6У
potentiometer
)
by
P P
of
amplifiers.
simultaneously
the
RTA.
intensity
PT2
By
the
is
and
a
10
intensities
so
turns
wired
the
balance
tandem
that
potentiometer
of
the
when
is
both
the
carried
channels.
intensity
out
PTI
by
is
A
of
ik“
4T1090075
escotek
ky
4/11
the
The
channel
Il
is
output
isolation
(05...09
operate
and
adjusted
are
output
highest
When
and
outputs
016.017).
in
the
D23
decreased
and
as
to
short
amplifiers
not
polarity
to
are
1
is
increased
and
of
the
transformers
Q13...Q17).
current
The
minimum
circuit,
clipped
the
cut
outputs.
off.
by
PT2
vice
sources
cross-over-distortions
is
output
is
versa.
adjustable
12
The
by
trimmers
the
100mA.
current
positive
Then
Analogously
and
by
means
highest
When
output
a
the
the
amplifiers
T4
RTS
the
is
relay
when
intensity
to
amplifiers
of
output
and
output
output
about
negative
the
the
Re2
of
ΕΤ).
current
40
connects
negative
of
the
are
output
transistors
load
mA.
half-waves
the
When
supplied
are
outputs
the
of
is
channel
amplifiers
wired
(Q8,Q9
outputs
the
lk.,
diodes
of
polarity
via
to
are
both
the
D20
the
is
used
Rel
the
(POLARITY)
b
meter
When
a
ON-state
in
current
time
To
series
diodes
and
polarity
an
indicator
for
the
transistor
parallel
the
measure
two
and
of
channel
with
D19
Re2
via
the
the
the
and
are
is
controlled
the
which
channel
electrode
020
a
with
the
to
relay
channels
II
output
D22
controlled
PIA-circuit
is
|.
therapy
OFF-state.
Re4
the
outputs.
outputs
comes
is
disconnected.
currents
cut
by
on
connects
The
off
by
the
the
is
of
from
there
the
IC16.
Then
alternating
positive
the
polarity
display
used
the
the
the
are
PIA-circuit
The
a
outputs
channel
polarity
(IC25)
the
PIA-circuit
transistor
channel
trimmers
half-waves.
seting
of
I.
I
voltages
IC15.
bushbutton
is
of
the
021
the
Thus
and
at
RT6
Relays
Changing
indicated
current
IC16
turns
channel
the
the
and
RT8
which
S2
sets
to
IJ]
sum-
same
in
are
generated
transformers
dre
15
11).
so
mV
adjusted
DC-change
across
T3
and
that
in
the
T5
the
to
an
outputs
trimmers
a
AC/DC-converter
1
mA
change
of
are
the
supplied
in
output
converters
(1C10).
current
via
RT6
(points
isolating
and
generates
10
and
RTE
1710900/£
escotek
ky
5/11
The
of
priciple.
channel
pulse
1C15.
outputs
a
6-channel
From
which
duration
timer
currents
PTA-circuit
The
two
LPROM-memory
attenuation
selection
IC18.
microprocessor
PIA-circuits
and
of
are
of
The
the
has
the
IC15
of
the
AD-converter
controls
the
RAMP
output
a
duration
pulse
Thus
converted
the
(1620).
of
the
the
AD-converter
AC/DC-converters
of
the
START-control
of
a
propotional
is
measured
the
of
(1C€15,1C16),
DC-voltages
into
current
the
The
both
digital
unit
channels
IC11
NAND-gate
meters
PIA-circuit
which
AD-converter
consists
two
(1C11),
are
by
propotional
words,
of
supplied
operates
come
1012
to
the
the
of
timers
(1C5...1C8),
the
from
(point
the
third
which
display.
a
CPU-circuit
(1C18,1C19)
IC15
RAMP
for
the
input
START-
to
in
integrating
selecting
PIA-circuit
12)
voltage.
counter
to
the
control
controls
the
the
comes
of
via
(1C17),
channel
control
inputs
the
The
the
output
the
and
the
a
a
of
the
buzzer
thumbweel
START-,
1616
two
1619
the
phase-locked-loop
4000
generates
control
The
the
The
AD-converter,
(Bl).
switches
POLARITY-
controls
or
four
generates
second
Hz
for
a
the
third
AD-converter.
display
counter
The
the
electrode
reference
counter
the
channel
frequency
treatment
unit
the
polarity
PIA-circuit
(S5,S6)
and
display
and
TIME-switches.
operates
time
of
the
consists
methode.
frquencies
the
Il.
500
1C18
and
and
third
The
and
IC16
relays
as
Hz,
the
measures
of
relays
reads
the
second
interrupts
The
a
programmable
counter
which
multiplexing
the
(Rel
Futuremore
(Re3,Re4)
first
for
counter
produces
the
treatment
and
the
counter
the
phase-locked-loop,
generates
integration
Re2)
positions
coming
the
which
counter
of
of
PIA-circuit
of
a
the
interrupts
the
time
and
of
from
select
the
for
frequency
timer
display.
time
the
the
them
the
timer
the
1618
clock
müm
E
m
to
of
(1C26...1C29),
current
controls
digits
controlled
Q23...029.
meter
in
the
for
via
transistors
multiplexing
by
a
current
the
BCD/7-segment
channel
principle.
meter
Q30...Q39
for
II.
The
decoder
A
BCD/decimal
the
segments
the
common
IC21
channel
cathodes
of
and
decoder
the
by
transistors
1
and
digits
of
the
1C22
the
are