4.2 Impedance and Admittance
159
Figure 4.2-12 Voltage and current waveforms for the R-L network
In this case we expect a voltage lead since an inductor is present, but also a phase difference of less
than 90ι because a resistor is also present.
Following an identical procedure to that used for the R-C circuit, the reader may verify that the
impedance worked out from the current and voltage markers in Figure 4.2-12 is the same as that
derived algebraically, shown below
Ω
This impedance may be represented in the complex plane as shown in Figure 4.2-13
Figure 4.2-13 Representation of or on the complex plane
0 0.5 1 1.5 2
Time (ns)
series_R_L
-1
-0.5
0
0.5
1
-20
-10
0
10
20
p2
p1
1.329 ns
17.4 mA
1.249 ns
0.9999 V
0.5819 ns
0 mA
0.5 ns
0 V
Vtime(M_PROBE.VP1,1)[*] (L, V)
series R_L
Itime(ACVS.V1,1)[*] (R, mA)
series R_L
p1: Freq = 1000 MHz
p2: Freq = 1000 MHz
30ι
50
28.4j
Conquer Radio Frequency
159 www.cadence.com/go/awr
