Zener clipping circuit

The circuit below should clip positive voltages at the Zener breakdown voltage and negative voltages at the diode cut-in voltage, approximately 0.6 volts  

This circuit is also simulated in Section 6.F.I. We would like to sweep VS from -15 volts to +15 volts and plot the output. Select PSpice and then New Simulation Profile from the Capture menus, select a name for the profile, and then click the Create button. Select the DC Sweep Analysis type and fill in the dialog box as shown  

The dialog box is set to sweep 1 5 from 1S volts to +15 volts in 0.01 volt steps. Click the OK button to return to the schematic. Run the analysis by selecting PSpice and then Run  

The screen capture above is the transfer curve for this circuit. 

EXERCISE 1-5 Find the transfer curve of the circuit below  

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