UNIVERSITY OF CALIFORNIA AT BERKELEYCollege of EngineeringDepartment of Electrical Engineering and Computer SciencesEE105 Lab Exp er imentsReport 8: Multi-stage AmplifiersName:Lab Section:3.1.3 Measure IBIASand the DC voltage at vOU T.IBIAS=vOU T=3.1.4 Using the oscilloscope, plot both the input vINand the output vOU T. Sketch the waveforms youobserve.3.1.5 Why is vOU Tnot sinusoidal?3.1.7 What is the p e ak-to-peak voltage of the output waveform (at vL) with the load resisto r? What is thegain o f the amplifier with the resistive load?12vL,p−p=vLvin=3.2.1 Can you hear anything when the speaker is directly hooked up to the function generator?Yes or No3.2.3 Can you hear anything when the speaker is hooked up to the output of the amplifier?Yes or No3.2.4 Measure IBIAS1, IBIAS2, and the DC voltages at vOU T 1and vOU T 2.IBIAS1=IBIAS2=vOU T 1,DC=vOU T 2,DC=3.2.5 Measure VBEof Q2. Is the DC voltage at vOU T 1enough to bias Q2in the forward active region?VBE=Yes or No3.2.6 Using the oscilloscope, plot both the input vINand the output vOU T 2. Sketch these waveforms (a plotis on the following page).3.2.7 Measure the gain vout2/vin.vout2vin=3.2.8 Now increase the DC offset of the input waveform to 620 mV. What happens to the waveform atvOU T
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