RLC CIRCUITS
R L C COMPONENTS
Summary
By: Neil E. Cotter
TOOL:
R
L
C
Series Equivalent
REq = R1 + R2
LEq = L1 + L2
CEq = C1 || C2
Parallel Equivalent
REq = R1 || R2
LEq = L1 || L2
CEq = C1 + C2
Water Analogy
Circuit Symbol
v = iR
i-v Equation
Energy Stored
0
Final Value Equiv
R
v=L
w=
di
dt
1 2
Li
2
i=C
dv
dt
1
w = Cv 2
2
wire
open
Source Equivalent
i-source
v-source
Time constant (with R)
τ = RC
τ = L/R
jωL
1/jωC
Impedance
Note: A || B =
R
1
1 1
+
A B