Problem 8.4 - Source-Free Response and PROBE Graph of Equation
*
* Repeat the analysis of Problem 8.3 except use a fixed value of
* resistance R1 equal to the critical damping resistance.
* Use PROBE to plot the graph of i(t) and the calculated expression
* for the circuit current.
* Estimate undamped natural frequency; set .TRAN for four cycles.
*
L1 0 1 ??? ??? ; Enter inductance value and initial current.
R1 1 2 200
C1 2 0 ??? ??? ; Enter capacitance value and initial voltage.
.TRAN ??? 250U ??? ??? UIC
; Enter the parameters for the .TRAN command.
; TSTEP should be TFINAL/40, and the maximum
; step size should be about TFINAL/100.
; Add .PRINT and/or .PLOT commands as desired
; for listed or printer-plot output.
.PROBE
.END