ECET 220 Week 4 ilab Devry

Course Number: ECET220

Professor:

Laboratory Number: 4

Laboratory Title: Analysis of Field Effect Transistor Amplifiers

Submittal Date:

Objectives:

Given the schematic of a common-source JFET amplifier circuit:

1. Corroborate and determine the circuit parameters
2. Using DC analysis, determine the voltages (V_S, V_G and V_D) through theoretical, simulation and construction of the common-source JFET amplifier circuit
3. Using AC analysis, determine the phase relationship of the input and output voltage phase relationship as well as the circuit’s voltage gain

Observations/Measurements:

III. A. 1. Theoretical analysis of the circuit

III. B. 2. MultiSim simulation and circuit measurements

III. B. 3. Paste input and output waveforms from the oscilloscope below.

a.   What is the peak-to-peak voltage of V_in from the oscilloscope waveform?

b.   What is the peak-to-peak voltage of V_out from the oscilloscope waveform?

c.   Are the V_in and V_out waveforms in phase or out of phase?

d.   Calculate the voltage gain (A_V) of this circuit?

e.   Can the voltage gain of a common-source amplifier be greater than 1?

III. B. 4. Paste input and output waveforms from the oscilloscope below

1. What is the peak-to-peak voltage of V_in from the oscilloscope waveform?

    

b.   What is the peak-to-peak voltage of V_out from the oscilloscope waveform?

c.   Calculate the voltage gain (A_V) of this circuit?

d.   Does decreasing the value of V_DD increase the voltage gain?

III. C. 1. Place a digital photo of your circuit below.

III. C. 3. Hardware circuit and circuit measurements

III. C. 4. Paste input and output waveforms from the oscilloscope below.

a.   What is the peak-to-peak voltage of V_in from the oscilloscope waveform?

b.   What is the peak-to-peak voltage of V_out from the oscilloscope waveform?