Hardware Reference
In-Depth Information
V
GA
(V
GB
)
V
in1
V
GB
(V
GA
)
X
I
0
Z
CCII+
V
GB
(V
GA
)
Y
V
in2
V
GA
(V
GB
)
Fig. 8.11 Voltage- to- current converter using MOS resistive circuit [
1
]
V
GA
(V
GB
)
V
in1
V
GB
(V
GA
)
V
0
X
CCII+
Z
V
GB
(V
GA
)
V
2
Y
V
in2
V
GA
(V
GB
)
Fig. 8.12 An alternative analog divider circuit [
1
]
The workability of all the mentioned circuits has been verified in [
1
]by
implementing the CCII+ using the supply current sensing technique based upon
LF356 IC op-amps and CA3096 type transistor arrays. However, it is obvious that
all the circuits can be implemented in entirely CMOS technology by employing
CMOS CCII+ architectures instead of the CCII+ obtained by power supply sensing
technique.
In Fig.
8.14
, assuming that the MOSFETs are operating in triode region and are
characterized by the following relationship between the drain current and gate-to-
source and drain-to-source voltages.
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