Analog Filter Design Revisited: Circuit Configurations Using Newer Varieties of CCs - Current Conveyors: Variants, Applications and Hardware Implementations - page 415

I L0

I R0

I in

V 0
I C0

MOCCII-2

I HP

MOCCII-1

z−
z+
z−

z−
z+
z−

y

x

x

C 1 y

I BP

R 1

C 2

MOCCII-3

y z−

z−

z+

x

I LP

R 2

I BE /I AP

Fig. 12.46 The new universal SIMO-type current-mode biquad proposed by Senani and Singh
[ 125 ]

s 2 C 1 R 1 C 2 R 2 þ Ds ðÞ¼ sC 1 R 2 þ 1 ð 12 : 165 Þ

Senani-Singh-Singh biquad A minimal realization of SIMO-type universal CM
biquad employing three MOCCs and six grounded passive elements which offers
tunability of all the three filter parameters namely, H 0 , ˉ 0 and bandwidth while

retaining all other advantages of its predecessor has been presented by Senani
et al. [ 126 ] as shown in Fig. 12.47 .
Assuming MOCCs are to be characterized by by i y ¼

0, v x ¼ v y ,i z + ¼ i x and

i z ¼ i x the three current transfer functions realized by the circuit are given by:

R 4 s 2 C 1 R 1 C 2 R 2
Ds

R 4 sC 2 R 2
Ds

R 4
Ds

R 3 R 3 R 3

I 01
I in ¼

I 02
I in ¼

I 03
I in ¼

ð 12 : 166 Þ

; ;

ðÞ ðÞ ðÞ

A notch response is realized by summing I 01 and I 03 (I 04 ¼ I 01 +I 03 ) and an APF can

be realized by summing I 02 also (I 05 ¼ I 01 +I 02 +I 03 ) thereby yielding:

R 4 s 2 C 1 R 1 C 2 R 2 þ

R 3

ð 1 Þ

I 04
I in ¼

and I 05
I in Ds ðÞ

R 4 s 2 C 1 R 1 C 2 R 2

R 3

ð sC 2 R 2 þ 1 Þ

¼ ð 12 : 167 Þ

Ds ðÞ

where