58 Phasors in action

Ganago phasorsinaccon 19 filters1

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Unformatted text preview: circuit
equaCons
if:
 •  All
sources
are
sinusoidal,
at
the
same
 frequency
 •  The
sinusoidal
steady‐state
has
been
achieved
 •  All
circuit
elements
are
linear

 •  No
clipped
signals
in
Op
Amps
 ©
2009
A.
Ganago
 Phasors
in
AcCon
 12
 2
 10/26/09
 Phase
shiKs
(1)
 •  For
a
resistor,
sinusoidal
voltage
is
always
in‐ phase
with
current
 •  For
a
capacitor
or
inductor,
sinusoidal
voltage
 is
always
shiKed
by
90
degrees
from
the
 current
 •  The
shiKs
are
opposite
in
the
capacitor
and
in
 the
inductor

 Phase
shiKs
(2)
 •  For
a
capacitor:
ZC
=
1/(jωC);
VC
=
ZC
IC
 •  If
the
capacitor
current
serves
as
referenc...
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