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Berkeley ELENG 105 - The Curve Tracer

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Experiment 3 - The Curve Tracer1.0 Objectives2.0 PrelabQ1. Review the primer on basic circuit analysis (see Appendix in lab manual). Carefully sketch th...Q2. Sketch the parametric I-V graph of the following circuits (10 mA, 10 V full scale) with the c...Q3. The canned FET program controls the SMU’s in the following way. Sketch the connections you wo...3.0 Procedure3.1 HP 4155A/B Setup and Use1. Using the front panel, create a program to generate 2-terminal I-V characteristics with 10 mA,...2. Generate the I-V curve for the prelab circuits 1a and 1b. Print the graphs.3. Input a program for the 3-terminal parametric I-V measurement described in prelab Question 2a ...4. Generate the I-V curve for the prelab circuits 2a and 2b. Print the graph. (You can start with...5. Save your program on your floppy.3.2 Diode I-V Characteristics1. Take the 4-quadrant I-V characteristics of a simple silicon diode using the same scale as in 3...2. Take the log I vs linear V characteristics of the diode in the forward-biased quadrant (i.e., ...4.0 Appendix: General Overview of HP 4155A/B1 Introduction2 Principle of Operation4 Built-in or “Canned” Programs5 Detailed Information on Operating the 41555.1 What compliance means5.2 How relay switches operate5.3 Generating an I-V curve for a resistor1. Begin by pushing the Chan button. The title of the page should be “Channels: channel definition.”2. Select the “Measurement mode” option. On the right, you’ll see many canned programs as well as...3. In the “Channels” section, SMU1 is now defined as a variable voltage source, and SMU3 is a com...4. Insert the resistor into the test fixture by connecting it between SMU1 and SMU3.5. Push the Next Page button. The “User definition” page should appear, which we don’t need. Push...6. Select the “start” option and set it to the initial voltage for the sweep.7. Highlight the “stop” option and set it to the final voltage for the sweep.8. Usually, 100-500 steps are sufficient. If the number of steps is not in this range, change the...9. This page defines your x and y axis boundaries. Change the min and max values to appropriate v...10. Push the Single button to start the measurement.5.4 Creating a constant voltage source5.5 Printing5.6 Saving files1Experiment 3 - The Curve TracerW. Oldham, W.T. Yeung, R. Lu, and R.T. HoweUC Berkeley EE 105, Fall 20031.0 ObjectivesThe purposes are twofold: (1) Familiarity and competency in use of the HP (now Agi-lent Technologies) 4155A or 4155B as curve tracers, and (2) thorough understanding ofI-V curves for linear and non-linear electronic devices.2.0 PrelabRead the HP 4155A/B instrument manual pages 4-10 -- 4-39 and 3-70 -- 3-77 appended to the end of this experiment and answer these questions.Q1. Review the primer on basic circuit analysis (see Appendix in lab manual). Carefully sketch the I-V characteristics of the following circuits. Use 10 mA full scale with 1mA ticks for the ordinate and 10 V full scale with 1 V ticks for the abscissa.2 K4 K.67 KI(a)V(b)I1.5 V 1 K+−V+−Prelab2 Experiment 3 - The Curve TracerQ2.Sketch the parametric I-V graph of the following circuits (10 mA, 10 V full scale) with the control electrode “G” set at 0, 1, 2, 3, 4, 5 V. We want (y axis) plotted versus (x axis) with as a parameter. See the Supplementary Notes to this lab for help on the relay control. Q3. The canned FET program controls the SMU’s in the following way. Sketch the connections you would use to accomplish the measurement described in Q2a. (Which SMU would you use for which terminal, S, G, or D, and indicate which SMU current and voltage are to be plotted for the vs curve?)IDVDSVGS(a)(b)1 K+−V1 KG1 K1 K10 KIDSDGIDDRelay switchRelay controlSNeed 100 mA complianceon IGVDS-IDIDVDS+_V2I2SMU2+_V1I1SMU1+_V3I3SMU3V1 vs timeV10=0tV2 vs timeV20tV3 vs timeV30tProcedureExperiment 3 - The Curve Tracer 3Note: 3.0 Procedure3.1 HP 4155A/B Setup and Use1. Using the front panel, create a program to generate 2-terminal I-V characteristics with 10 mA, 10 V full scale. Start with the “canned” diode program.2. Generate the I-V curve for the prelab circuits 1a and 1b. Print the graphs.3. Input a program for the 3-terminal parametric I-V measurement described in prelab Question 2a and 2b.4. Generate the I-V curve for the prelab circuits 2a and 2b. Print the graph. (You can start with the “canned” program.)5. Save your program on your floppy.3.2 Diode I-V Characteristics1. Take the 4-quadrant I-V characteristics of a simple silicon diode using the same scale as in 3.1-1. Print the curves. Use a pencil to draw a straight line approximation (2 straight lines to approximate the entire 4-quadrant graph.)2. Take the log I vs linear V characteristics of the diode in the forward-biased quadrant (i.e., for V polarity which causes current flow). Cover the range to . Print the plot. (hint: you can make a simple modification to your program to do this.)4.0 Appendix: General Overview of HP 4155A/B1 IntroductionThese instruments are general-purpose “parameter analyzers,” that is, instruments that can extract, plot, and analyze the terminal characteristics of devices and circuits. In this course we will introduce them (and largely use them) as simple “curve tracers,” that is, tools to display the I vs V behavior of devices and simple circuits containing devices. If you are not completely familiar with the concept of characterizing a box by its terminal I-V characteristics, please review the first appendix to the lab manual. +_Vis the symbol for an ammeter, andis the symbol for a voltage sourceFSETIDS vs VDSI109–A=101– AAppendix: General Overview of HP 4155A/B4 Experiment 3 - The Curve Tracer2 Principle of OperationThe HP 4155A/B instruments are far more powerful than we need, just as your com-puter spreadsheet program is much more powerful than 99% of user requirements). For example, on these instruments there are 4 independent drive/sense nodes called “SMUs” (connection points where the instrument will be happy to apply any potential you desire and monitor the current or, alternatively, apply a current and monitor the potential); 2 voltage source nodes “VSUs;” voltage monitor nodes “VMUs;” as well as some other programmable nodes we don't need to talk about. We will generally use only the three SMUs in this lab.4 Built-in or “Canned” ProgramsYou will find some especially useful built-programs that do almost 100% of


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Berkeley ELENG 105 - The Curve Tracer

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