User manual
page 26
Analog System Lab Kit PRO
experiment 2
2.2 Exercise Set 2
Design a regenerative feedback circuit with the hysteresis of
--
V
bV
==
1
1
1
1
1
2
2
1
1
1
1
1,5
4
ln
ln
ln
VA
V
V
A
A
RR
R
A
A
A
V
V
V
V
V
TRC
RC
t
RC
V
RR
R
R
R
R
f
T
kHz
ms
RC
1
1
1
12
1
0
12
1
1
i
i
ss
ss
ss
ss
ss
00 0
0
0
0
0
0
2
$
$
$
$
$
$
$
$
$
$$
$
$
!
1
b
b
b
b
b
b
b
b
b
b
b
b
b
x
&
=
=
=
+
=
+
=
+
=
+
=
=
x
x
x
=-
-
+
-
-
-
+
_
d
d
d
i
n
n
n
. Obtain the
DC transfer characteristics of the system. Estimate the hysteresis and see how
it can be controlled by varying the regenerative feedback
--
V
bV
==
1
1
1
1
1
2
2
1
1
1
1
1,5
4
ln
ln
ln
VA
V
V
A
A
RR
R
A
A
A
V
V
V
V
V
TRC
RC
t
RC
V
RR
R
R
R
R
f
T
kHz
ms
RC
1
1
1
12
1
0
12
1
1
i
i
ss
ss
ss
ss
ss
00 0
0
0
0
0
0
2
$
$
$
$
$
$
$
$
$
$$
$
$
!
1
b
b
b
b
b
b
b
b
b
b
b
b
b
x
&
=
=
=
+
=
+
=
+
=
+
=
=
x
x
x
=-
-
+
-
-
-
+
_
d
d
d
i
n
n
n
.
Vary either
--
V
bV
==
1
1
1
1
1
2
2
1
1
1
1
1,5
4
ln
ln
ln
VA
V
V
A
A
RR
R
A
A
A
V
V
V
V
V
TRC
RC
t
RC
V
RR
R
R
R
R
f
T
kHz
ms
RC
1
1
1
12
1
0
12
1
1
i
i
ss
ss
ss
ss
ss
00 0
0
0
0
0
0
2
$
$
$
$
$
$
$
$
$
$$
$
$
!
1
b
b
b
b
b
b
b
b
b
b
b
b
b
x
&
=
=
=
+
=
+
=
+
=
+
=
=
x
x
x
=-
-
+
-
-
-
+
_
d
d
d
i
n
n
n
or
--
V
bV
==
1
1
1
1
1
2
2
1
1
1
1
1,5
4
ln
ln
ln
VA
V
V
A
A
RR
R
A
A
A
V
V
V
V
V
TRC
RC
t
RC
V
RR
R
R
R
R
f
T
kHz
ms
RC
1
1
1
12
1
0
12
1
1
i
i
ss
ss
ss
ss
ss
00 0
0
0
0
0
0
2
$
$
$
$
$
$
$
$
$
$$
$
$
!
1
b
b
b
b
b
b
b
b
b
b
b
b
b
x
&
=
=
=
+
=
+
=
+
=
+
=
=
x
x
x
=-
-
+
-
-
-
+
_
d
d
d
i
n
n
n
in order to vary
--
V
bV
==
1
1
1
1
1
2
2
1
1
1
1
1,5
4
ln
ln
ln
VA
V
V
A
A
RR
R
A
A
A
V
V
V
V
V
TRC
RC
t
RC
V
RR
R
R
R
R
f
T
kHz
ms
RC
1
1
1
12
1
0
12
1
1
i
i
ss
ss
ss
ss
ss
00 0
0
0
0
0
0
2
$
$
$
$
$
$
$
$
$
$$
$
$
!
1
b
b
b
b
b
b
b
b
b
b
b
b
b
x
&
=
=
=
+
=
+
=
+
=
+
=
=
x
x
x
=-
-
+
-
-
-
+
_
d
d
d
i
n
n
n
. Apply the triangular waveform with
the peak voltage of 10V at a given frequency to both circuits and observe the
output waveform.
a) Submit the simulation results for DC transfer characteristics.
b)
Take the plots of DC transfer characteristics from oscilloscope and
compare it with simulation results.
1
2
3
c) Vary the regenerative feedback and see the variation in the
hysteresis, hysteresis is directly proportional to regenerative
feedback.
Design an astable multivibrator using charging and discharging of capacitor
C through resistance R between input and output of the Schmitt trigger. See
Figure 2.4. Assume that frequency
--
V
bV
==
1
1
1
1
1
2
2
1
1
1
1
1,5
4
ln
ln
ln
VA
V
V
A
A
RR
R
A
A
A
V
V
V
V
V
TRC
RC
t
RC
V
RR
R
R
R
R
f
T
kHz
ms
RC
1
1
1
12
1
0
12
1
1
i
i
ss
ss
ss
ss
ss
00 0
0
0
0
0
0
2
$
$
$
$
$
$
$
$
$
$$
$
$
!
1
b
b
b
b
b
b
b
b
b
b
b
b
b
x
&
=
=
=
+
=
+
=
+
=
+
=
=
x
x
x
=-
-
+
-
-
-
+
_
d
d
d
i
n
n
n
.
Design a monostable multivibrator for
--
V
bV
==
1
1
1
1
1
2
2
1
1
1
1
1,5
4
ln
ln
ln
VA
V
V
A
A
RR
R
A
A
A
V
V
V
V
V
TRC
RC
t
RC
V
RR
R
R
R
R
f
T
kHz
ms
RC
1
1
1
12
1
0
12
1
1
i
i
ss
ss
ss
ss
ss
00 0
0
0
0
0
0
2
$
$
$
$
$
$
$
$
$
$$
$
$
!
1
b
b
b
b
b
b
b
b
b
b
b
b
b
x
&
=
=
=
+
=
+
=
+
=
+
=
=
x
x
x
=-
-
+
-
-
-
+
_
d
d
d
i
n
n
n
and estimate
--
V
bV
==
1
1
1
1
1
2
2
1
1
1
1
1,5
4
ln
ln
ln
VA
V
V
A
A
RR
R
A
A
A
V
V
V
V
V
TRC
RC
t
RC
V
RR
R
R
R
R
f
T
kHz
ms
RC
1
1
1
12
1
0
12
1
1
i
i
ss
ss
ss
ss
ss
00 0
0
0
0
0
0
2
$
$
$
$
$
$
$
$
$
$$
$
$
!
1
b
b
b
b
b
b
b
b
b
b
b
b
b
x
&
=
=
=
+
=
+
=
+
=
+
=
=
x
x
x
=-
-
+
-
-
-
+
_
d
d
d
i
n
n
n
using the
formula 2.5.
Notes on Experiment 2: