Biomedical Engineering Reference
In-Depth Information
Figure 1.30
Switched-capacitor instrumentation ampli
fi
er timing and equivalent circuits:
(
a
) basic equivalent circuit; (
b
) switching timing; (
c
)
rst even-
phase equivalent; (
e
) generalized even-phase equivalent circuit; (
f
) analog equivalent circuit.
fi
first odd-phase equivalent circuit; (
d
)
fi
voltage and C
H
causes output voltage
V
out
to track the di
erence between the circuit's
inputs
V
in diff
, rejecting common-mode voltages
V
in CM
. Assuming that the characteristics
of the op-amp approach those of an ideal op-amp, the transfer characteristics of the circuit
may be determined by following conventional network analysis methods. The equivalent
ff
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