Example 3.6 - Source-free Response of Series RLC Circuit
*
* NOTE: This is a 2-part problem. The difference between the two parts
* is the value of resistance R1. The damping ratio of the circuit
* and the corresponding changes in the oscillatory response
* of the circuit are the important points of the problem.
*
.OPT NOBIAS
R1 1 0 15 ; Circuit damping ratio = .237
L1 1 2 1M
C1 2 0 1U IC=10
.TRAN 15E-6 .6E-3 0 7.5E-6 UIC ; Undamped natural frequency of
; the circuit is approx 5000 Hz.
; The .TRAN final time of 600 microseconds
; will display 3 cycles of the transient.
.PROBE V(2)
.PLOT TRAN V(2)
.END
Example 3.6 - Source-free Response of Series RLC Circuit
.OPT NOBIAS
R1 1 0 30 ; Circuit damping ratio = .474
L1 1 2 1M
C1 2 0 1U IC=10
.TRAN 15E-6 .6E-3 0 7.5E-6 UIC
.PROBE V(2)
.PLOT TRAN V(2)
.END