Varieties of Current Conveyors - Current Conveyors: Variants, Applications and Hardware Implementations - page 333

Fig. 10.23 The block
diagram of the TXTZ CCII

i x1 i z1

V x1

X 1 Z 1

i y

TXTZ
CCII

V y

Y

i z2

i x2

Z 2

X 2

V x2

Fig. 10.24 Simplified
representation of a CMOS
implementation of the
TXTZ-CCII as devised
in [ 63 ]

+V

I 0

Q 3

Q 1

Q 2

Y

X 2 Z 2

X 1 Z 1

Q 4

Q 6

Q 5

I 0

−V

10.2.23 TXTZ CCII

The two-X and two-Z second generation current conveyor (TXTZCCII), as sym-
bolically shown in Fig. 10.23 , was introduced by Fongsamut and Surakampontorn
in [ 63 ] and is characterized by the following matrix:

2
4

3
5

2
4

3
5

2
4

3
5

i y
v x 1
v x 2
i z 1
i z 2

00000
10000
10000
01000
00100

v y
i x 1
i x 2
v z 1
v z 2

¼ ð 10 : 23 Þ

Through two examples, the authors of [ 63 ] have demonstrated that a TXTZ-CCII is
particularly useful in realizing single-element-controlled sinusoidal oscillator using
a bare minimum of only four passive components (i.e. only two resistors and only
two capacitors). A typical bipolar implementation is shown in Fig. 10.24 which is