Dr. Graciano Dieck Assad / Ing. Matías Vázquez Piñón
Y our report must include the following:
The schematic capture or the Spice deck of the RC and RL circuits on LTspice. Include the Spice directives used to perform measurements and analysis.
The output plots of both analyzed circuits (VC for the RC network and IL for the RL network).
Include your hand calculations for the time constant of both circuits.
Modify your LTspice file (schematic or Spice deck) to calculate the time constant automatically using Spice directives. Compare them with one obtained manually. What is the percentage error?
The input and output plot for the sinusoidal stable state of the RC network of the figure below:
Figure A. Transient analysis results of the RC network
Show the measurements obtained using the Spice directives for the gain and phase angle of
V(out). Compare this result with the voltage phasor that you obtained by performing the AC sweep analysis. What is the percentage error for both, magnitude and phase of V(out)?
For the sinusoidal stable state analysis of the RL network, perform the same procedure to measure the voltage gain and phase angle of the RC network of the Figure A to obtain these same parameters for the circuit of Figure B. Report your measurements using the Spice
1 D.R. © Instituto Tecnológico y de Estudios Superiores de Monterrey, México 201 2
Dr. Graciano Dieck Assad / Ing. Matías Vázquez Piñón directives and a comparison with the voltage phasor obtained using an AC sweep analysis.
What is the percentage error for both, magnitude and phase of V(out)?
Figure B. RL network to find its time constant
2 D.R. © Instituto Tecnológico y de Estudios Superiores de Monterrey, México 201 2