Second Generation Applications of Other Types of Current Conveyors in Realizing Synthetic Impedances - Current Conveyors: Variants, Applications and Hardware Implementations - page 483

14.22 Grounded Inductance Simulator Using DCCII

A second-generation CC with current differencing capability is known as differen-
tial CC (DCCII). The DCCII is a five-port active analog building block and can
ideally be characterized by the following matrix equation:

2
4

3
5

2
4

3
5

V XN
V XP
I Zþ
I Z
I Y

001
001
1

2
4

3
5

I XP
I XN
V Y

¼ 10 ð 14 : 48 Þ

1 10

000

Figure 14.26 shows two grounded inductance simulators employing single DCCII
with three passive components proposed by Metin [ 50 ].
The input admittance of circuits in Fig. 14.26a and b can be obtained using
straight forward circuit analysis assuming ideal DCCII as:

1

Y ina ¼ ð 14 : 49 Þ

ð R 2 R 1 Þ þ sCR 1 R 2

1
sCR 1 R 2 þ

R 2 R 1

R 1 R 2

Y inb ¼ ð 14 : 50 Þ

Thus, circuit of Fig. 14.26a simulates series R-L impedance while the circuit of
Fig. 14.26b realizes parallel R-L impedance.
To verify the workability of the simulated inductors a Bipolar DCCII realizable
with transistor arrays ALA 400 from AT & T were used [ 50 ]. The DCCII was
biased with

2.5 V DC power supply and the simulated inductors were used to
design a second-order BPF. The simulation results were found to be in good
agreement with the theory. By realizing the DCCII with commercially available
IC 844 the circuit was similarly tested in hardware also which confirmed the
workability of the circuit
DCCII based other circuits for inductance simulation have also been presented in
[ 27 ], however, the circuits therein do not employ a grounded capacitor.

a b

Y inb

y 1 z + y 1

z +

DCCII

DCCII

x N x N

x P

C R 1

x P z − z −

R 1

R 2

R 2

C

Y ina

Fig. 14.26 Grounded-capacitor inductance simulation circuits proposed by Metin [ 50 ]