Nonlinear Applications of CCs - Current Conveyors: Variants, Applications and Hardware Implementations - page 244

D

Y

X4 Z

X

R b

R y

R x

X

X5

Z X

X2 Z

Y

X

UX

X3

Z

Y

R a

Y

X

X1 Z

C a

Y

R 2

C 21 C 22

R 1

C 11

C 12

Fig. 8.32 A conservative oscillator proposed by Petrzela and Slezak (Adapted from [ 18 ] © 2008
Radioengineering)

two segment peace-wise linear element such that in the resulting circuit chaos is
observed by a simple change of an external DC voltage.
One such implementation is shown in Fig. 8.32 which employs two lossy FDNR
circuits to realize a fifth order dynamical system which become chaotic for com-
ponent values: C 11 ¼ C 12 ¼ C 21 ¼ 10 nF, C 22 ¼ 47 nF, C a ¼ 10 nF, R 1 ¼ 81 k ʩ ,

R 2 ¼ .

The discussion of chaotic circuits realizable with current conveyors is by no
means complete in this section whose objective was only to present some selected
circuits to demonstrate a variety of ways in which current conveyors have been used
by researchers to generate chaotic signals. The readers interesting in studying more
about CC based chaotic circuits are referred to [ 25 - 44 ] and those cited therein.

15.5 k ʩ ,R a ¼ 1.4 k ʩ ,R b ¼ 10 k ʩ and R y ¼ 5k ʩ

8.11 Miscellaneous Other Applications

Other than the applications of CCs highlighted above, there are several other
interesting applications which are briefly commented in the following. In [ 25 ]
Abuelma

atti has demonstrated how CCs can be used to generate ASK/FSK/PSK/
QAM waveforms useful in communications. Bruun and Haxthausen in [ 26 ] have
employed CC to design of an EMG amplifier with shut down control. A new
approach to designing active MMIC tuning element using CCII has been presented
by Sinsky and Westgate in [ 27 ]. In [ 29 ], Sampiepro and Bertuccio have designed a
zero power CC for DC stabilization and system rest of fast current pulse amplifiers.
Vlassis and Siskos [ 30 ] have employed CCs to design an interfacing circuit for
piezo-resistive pressure sensors with frequency output. A CC-based low voltage
CMOS current source for space plaza probe has been designed by Rajput and
Jamuar in [ 32 ]. Lastly, Acharya in [ 33 ] has designed a CC-based electrometer.

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