Analog Filter Design Revisited: Circuit Configurations Using Newer Varieties of CCs - Current Conveyors: Variants, Applications and Hardware Implementations - page 391

C 2 R 2

s 2 s

1

þ

1
C 1 C 2 R 1 R 2

V out 5
V in ¼

forR 1 ¼ R 3 ð 12 : 101 Þ

;

Ds ðÞ

C 2 R 1 R 2
Ds

R 2
Ds

s

1

s 2

1

I out 1
V in ¼

I out 2
V in ¼

and ð 12 : 102 Þ

ðÞ ðÞ

where

R 3
C 2 R 1 R 2

1
C 1 C 2 R 1 R 2

s 2

ðÞ¼ þ s þ ð : Þ

Ds 12 103

Case-II if Vin I in , the various

transfer functions in transresistance mode and CM are given by:

¼ 0 (grounded), I 2 ¼ 0 (open circuited) and I 1 ¼

C 2 R 2
Ds

R 3
C 1 C 2 R 1 R 2

R 3

s

s 2 R 3
Ds

V out 1
I in ¼

V out 2
I in ¼

V out 3

I in ¼

ð 12 : 104 Þ

; ;

Ds ðÞ ðÞ ðÞ

s 2 R 3 þ

R 3
C 1 C 2 R 1 R 2

V out 4
I in ¼

ð 12 : 105 Þ

Ds ðÞ

C 2 R 2

s 2 R 3

R 3 R 3

C 1 C 2 R 1 R 2

s þ

V out 5
I in ¼

forR 1 ¼ R 3 ð 12 : 106 Þ

;

Ds ðÞ

C 2 R 1 R 2
Ds

R 2
Ds

R 3

s 2 R 3 s

I out 1
I in ¼

and I out 2

I in ¼

ð 12 : 107 Þ

ðÞ ðÞ

where

R 3
C 2 R 1 R 2

1
C 1 C 2 R 1 R 2

s 2 Ds ðÞ¼ þ s þ ð 12 : 108 Þ

Case-III if V in ¼ I in then in addition to transfer functions

realized in case-II, the configuration gives the following transfer functions in
CM:

0 (grounded), I 2 ¼ I 1 ¼

s 2 þ

1
C 1 C 2 R 1 R 2

I out 3

I in ¼

and an APF can be obtained by connecting I out1 and I out3, i.e.,

DðÞ