Hardware Reference
In-Depth Information
Fig. 5.25 A circuit for
simulating a series RL type
floating inductance without
component-matching as
proposed by Singh [
19
]
I
1
CCII
V
1
y
-
x
I
2
V
2
z
C
R
1
R
2
i
1
R
1
V
1
1
CCII
C
x
y
z
-
L
r
a
2
1
R
2
i
2
r
b
V
2
2
Fig. 5.26 Bilinear floating inductor proposed by Nandi and Nandi [
36
]
Thus,
this grounded inductor circuit has the attractive feature that
it
is
completely insensitive to active parameter variations.
(b) If instead, terminals 1-1
/
are short-circuited one obtains Soliman
s Ford-Girling
equivalent circuit realization [
10
] with equivalent inductance and resistance
still given by the same values. Soliman
'
s circuit [
10
] is more advantageous in
realizing an FDNR in parallel with a capacitance, owing to the use of both
grounded capacitors which is a preferable feature from the point of view of
integrated circuit implementation.
'
At about the same time, Singh [
19
] reported a single-CC circuit independently
which employs exactly the same number of active and passive components but
simulates a floating series RL impedance without requiring any component-
matching condition. This circuit from [
19
] is shown in Fig.
5.25
.
The equivalent resistance (R
eq
) and inductance (L
eq
) for this circuit are given by
R
eq
¼
CR
1
R
2
.
A non-ideal analysis of this circuit, however, shows that the non-ideal parame-
ters of this circuit are quite complex in contrast to the circuit of Fig.
5.24
and as a
consequence, all the sensitivity coefficients of this circuit
are not low
.
In 1983 (i.e. exactly 4 years after the introduction of the single CCs FI by Senani in
[
16
] and Singh in [
19
]) Nandi and Nandi in [
36
] reported another single CCII-based
circuit with similar property but their circuit could realize only a bilinear floating
inductor with r
a
¼
(R
1
+R
2
), L
eq
¼
R
1
,r
b
¼
(R
2
R
1
)andL
¼
CR
1
R
2
. This circuit is shown in Fig.
5.26
.
Search WWH ::
Custom Search