Components

Use ProjectC1.mcd for calculations. Verify bias of Circuit C3 (i.e.V_CC < 10 V).

Procedure

• Type in RC. Run SetVCE.vi while re-adjusting VBB to verify that 0.1 mA<I_C<1 mA can be obtained without VCC>10V. VCC is ramped up to obtain VCE=2 V. This will be the operating point (bias) voltage in the gain measurement. Determine VBB for IC=0.1 mA, as in the example. Default and save this in the Front Panel, for use in the next two parts. Now re-run and determine the value of VBB corresponding to IC=0.5 mA. This is used in the next step.
  
  
• Circuit C1 is used to obtain dc parameters as in Project B. To obtain a fresh set of parameter values, open subVI IC_VCEsubC.vi. Set in RC and RB and VBB as determined above for IC=0.5 mA.
  
  
• Run the VI. When it has been verified that the VI operates properly, open IC_VCE_C.vi and set in RC and RB and VBB for IC=0.5 mA in the Front Panel of this VI. Run the VI to obtain values for VAF and IS. Get VAF for 1 V<VCE<3 V. Default and save the Front Panel to preserve these numbers. These parameters are also available for Project C2 on the npn – pnp amplifier.