Hardware Reference
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a
b
C
C
R 1
y
z p
y
z p
DXCCII
x p
DXCCII
x p
x n
z n
R 1
z n
x n
Y in
Y in
R 3
R 3
R 2
R 2
c
C
R 1
z p
y
DXCCII
x p
x n
z n
R 2
R 3
Z in
Fig. 14.22 Single DX-CCII-based inductance simulators proposed by Metin [ 5 ]
Z in ¼
R eq þ
sL eq
ð
14
:
40
Þ
2 R 2 R 3
R 1
R eq ¼
R 2 þ
R 3
L eq ¼
2 CR 2 R 3
ð
14
:
41
Þ
;
The circuits were tested using a CMOS DXCCII (Fig. 14.3 of [ 5 ]) with the
simulated inductors used to design a fifth order band pass filter with two simulated
inductors of values 50
μ
H and 100
μ
H. MOS transistors of DXCCII were simulated
μ
using TSMC 0.35
m CMOS process parameters. The DC bias voltage was taken as
2.5 V. Simulations demonstrated the usable frequency range of the circuits as
10 MHz.
Another grounded inductance simulator circuit has been presented by Myderrizi
et al. [ 45 ] employing single DX-CCII and three passive elements which can be
operated in 30 kHz-30 MHz frequency range. This circuit is shown in Fig. 14.23 .
Assuming ideal DX-CCII a routine circuit analysis of this circuit gives:
V in
I in ¼
sCR 2
Z in s
ðÞ ¼
if R 1 ¼
R 2 ¼
R
ð
14
:
42
Þ
Thus, in the circuit of Fig. 14.23 the value of inductance can be controlled by
grounded resistances R 1 and R 2.
Through SPICE simulations, it has been demonstrated [ 43 ] that the inductance
simulation circuit of Fig. 14.23 operates pretty well between 30 KHz and 10 MHz.
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