Answer Happy

Watch the video Task Experiment 3 – Exercise 1, where the BJT amplifier is built and the DC biasing IB, Ic and VCE are measured using the Analog Discovery 2 unit. a) We first build the BJT amplifier biasing circuit on the breadboard without applying any power or signal. We connect the ground points of the circuit to the ground rail of breadboard. The BJT pin configuration is shown in Figure 2. BC 548 BC-548 Collector 1 2 Base 3 Emitter Figure 2 BJT pin configuration. b) We then apply the power supply (i.e., Vcc) to the circuit from the Analog Discovery 2 unit. b.1 The Analog Discovery 2 ground is connected to the ground rail of the breadboard. b.2 The Power Supply V+ of the Analog Discovery 2 unit is connected to the circuit. b.3 The WaveForms software (the Supplies tool) is launched. We set the positive supply to 5V and then set the master enable to on to activate the power supply to the BJT circuit. c) The IB, IC and VCE of circuit are then measured. c.1 For VCE measurement: since this is a DC signal to measure, we use the Voltmeter tool of the Analog Discovery 2 unit. The measurement result is shown in Fig. 3. Channel 1 DC 827 mV True RMS 827 MV AC RMS 1 mV Figure 3 Voltmeter measurement result of VCE. 8011
Channel 1 DC 2.101 V True RMS 2.101 V AC RMS 2 mV Figure 4 Voltmeter measurement result of the voltage across resistor Rc. c.3 For Ig measurement: we first follow the step in c.2 to measure the voltage across the resistor R₁₁ and the voltage across the resistor R₁2. The corresponding currents Ib₁ and Ib2 can be calculated. Then we can apply KCL to calculate IB. The voltage measurement results are shown in Fig. 5. Channel 1 DC 2.37 V True RMS 2.37 V AC RMS 1 mV DC 2.64 V True RMS 2.64 V AC RMS 1 mV (b) Figure 5 Voltmeter measurement result of (a) the voltage across resistor R₁ and (b) the voltage across resistor Rb2. Q4: What are measured IB, IC and VCE of your circuit based on the results shown in Fig. 3 - Fig. 5? Q5: Present a table to show the results of IB, IC and VCE from: (1) hand calculation (Exercise 1 - Part 1); (2) Multisim simulations (Exercise 1 - Part 2) and (3) measurement (Exercise 1 - Part 3). Q6: Compare and discuss the results you filled into the table in Q5. Are the calculation, simulation and measurement results consistent with each other? If they are different, what are the possible reasons? (a) Channel 1