Second Generation Controlled Current Conveyors (CCCII) and Their Applications - Current Conveyors: Variants, Applications and Hardware Implementations - page 287

appear to have been proposed in the literature yet which appears to be another
worthwhile problem for further exploration.

9.13 PID Controller Using CCCIIs

Erdal et al. [ 42 ] demonstrated that using positive type CCCIIs along with two
passive components a PID controller can be systematically realized using a signal
flow graph based approach as shown in Fig. 9.43 . The controller gains K P ,K I ,K D
can easily found to be:

R 0 R 1
R x 1 R x 6 , K I ¼

R 0
R x 2 R x 7 C 1 and K D ¼

R x 4 R x 5 R o C 2
R x 3 R x 8

K P ¼ ð : Þ

9 58

A notable feature of this realization is that all the three controller gains can assigned
the required values by adjusting the control current I bi of selected CCCII. Since all
of them depend upon the X-terminal input resistances of the CCCIIs. This PID
circuit has been shown to be very useful for a stable control, very wide frequency
band which is almost 1MHz by appropriate selections of parameters values as
compared to PID controllers realized from conventional op-amps.

I

I

Y

1

Y

Z

I

X

6

Z

R 1

X

I

I

V i

Y

2

Z Y

II

X

7

Z

C 1

X

I

III I

Y

I

Y

8

V 0 Z

3

Z

Y X

R 0

4

X

Z

X

I

C 2

Y

5

Z

X

Fig. 9.43 A completely adjustable PID controller [ 42 ]