supply. the power supply. At minimum volume, the current drops to 200 mA. (a) You can simply consider the stereo as the load resistor R₁. Calculate the volume and minimum volume. (b) Design a full-wave rectifier power supply using a 9.52:1 transformer. Assu 120 Vrms @ 60 Hz. Further assume that the diode turn-on voltage VĎ(on) is 0 of C₁ such that vo has a maximum ripple of 1 Vp-p. Solve for the average va that this may be greater than 12 V) and iD(ave) = ID. (c) Add a series resistor to the secondary to limit the maximum surge cur secondary winding resistance of the transformer is 0.4 ohm. (d) Using PSPICE (with Is = 1 nA and n = 1.3 for the diodes), perform a transie and plot y. and I. for your r max and min values of R. Make sure your

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A Stereo uses a 12 V DC power supply. At full volume, a maximum current of 1.4 A is drawn from
the power supply. At minimum volume, the current drops to 200 mA.
(a) You can simply consider the stereo as the load resistor RL. Calculate the range of R₁ at full
volume and minimum volume.
(b) Design a full-wave rectifier power supply using a 9.52:1 transformer. Assume that the outlet is
120 Vrms @ 60 Hz. Further assume that the diode turn-on voltage VD(on) is 0.7 V. Pick the value
of C₁ such that vo has a maximum ripple of 1 Vp-p. Solve for the average value of v. = V. (note
that this may be greater than 12 V) and iD(ave) = ID.
(c) Add a series resistor to the secondary to limit the maximum surge current to 10 A if the
secondary winding resistance of the transformer is 0.4 ohm.
(d) Using PSPICE (with Is = 1 nA and n = 1.3 for the diodes), perform a transient simulation (.tran)
and plot vo and Io(surge) for your max. and min. values of R₁. Make sure your transient simulation
is long enough so that the output voltage reaches steady state. Measure the average output
voltage V. and ripple voltage vr. (For all SPICE homework, you need to print your input file
and sketch your schematic with all nodes numbered on the same page)
(e) Compare your calculation results and simulation results.
Transcribed Image Text:A Stereo uses a 12 V DC power supply. At full volume, a maximum current of 1.4 A is drawn from the power supply. At minimum volume, the current drops to 200 mA. (a) You can simply consider the stereo as the load resistor RL. Calculate the range of R₁ at full volume and minimum volume. (b) Design a full-wave rectifier power supply using a 9.52:1 transformer. Assume that the outlet is 120 Vrms @ 60 Hz. Further assume that the diode turn-on voltage VD(on) is 0.7 V. Pick the value of C₁ such that vo has a maximum ripple of 1 Vp-p. Solve for the average value of v. = V. (note that this may be greater than 12 V) and iD(ave) = ID. (c) Add a series resistor to the secondary to limit the maximum surge current to 10 A if the secondary winding resistance of the transformer is 0.4 ohm. (d) Using PSPICE (with Is = 1 nA and n = 1.3 for the diodes), perform a transient simulation (.tran) and plot vo and Io(surge) for your max. and min. values of R₁. Make sure your transient simulation is long enough so that the output voltage reaches steady state. Measure the average output voltage V. and ripple voltage vr. (For all SPICE homework, you need to print your input file and sketch your schematic with all nodes numbered on the same page) (e) Compare your calculation results and simulation results.
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