Second Generation Controlled Current Conveyors (CCCII) and Their Applications - Current Conveyors: Variants, Applications and Hardware Implementations - page 263

I 01

I 1

V 1 I 02

Y 1

CCCII+ Z 1 Y 2

Z 2

X 1 CCCII−

X 2

C

1

I 2

V 2

Fig. 9.19 Lossless floating inductance simulator proposed by Khan and Zaidi [ 17 ]

In the Sedra and Smith ' s two CCII-based gyrator, if CCCII are used instead of

CCII , along with a capacitor C, as shown in Fig. 9.20 , the resulting circuit would

realize a current-controlled grounded inductor.
The circuit of Fig. 9.20 has the input impedance as Z in ¼

sCR x 1 R x 2 thereby

realizing a grounded inductance of value:

CV T
4 I B 1 I B 2

L ¼ CR x 1 R x 2 ¼ ð 9 : 19 Þ

That a floating inductance can be realized using only a single grounded capacitor
along with four CCCII+ was shown by Kiranon and Pawarangkoon in [ 15 ]. Other
dual output CCCII-based circuits were subsequently presented in [ 18 ] and [ 19 ]. A
circuit from [ 18 ] which employs only two dual outputs (DO) CCCIIs (DO-CCCIIs)
to realize lossless floating inductance is shown in Fig. 9.21 .
The circuit is described by the following equations:

I 1 ¼ I 2 ¼ sCR x1 R x2 V 1 ð V 2 Þ ð 9 : 20 Þ

so that the inductance value realized between ports 1 and 2, is given by:

CV T
4 I B 1 I B 2

L ¼ CR x1 R x2 ¼ ð 9 : 21 Þ

It may be noted that equivalent L is controllable by any or both of the two external
DC bias currents I B1 and I B2 .