lab1_bjt_procedure

lab1_bjt_procedure - ECE 327: Electronic Devices and...

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Unformatted text preview: ECE 327: Electronic Devices and Circuits Laboratory I Procedure Notes for Lab 1 (Bipolar (Junction) Transistor Lab) Abstract The laboratory procedure is broadly outlined in the lab book . You are expected to gather all data and answer all questions required by that text. Here, some additional details are presented that should help you build and troubleshoot your circuits. Another supplementary handout will give schematics and explanatory information about the circuits. Contents 1 Common-Emitter Amplifier (Level-Shifter Amplifier) 1 Troubleshooting the Common-Emitter Amplifier . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 2 pnp Current Source (Common-Base (Power) Amplifier) 3 Example Data Plots . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 3 Followers 4 Emitter Follower (Common-Collector (Power) Amplifier) . . . . . . . . . . . . . . . . . . . . . . 4 Simple PushPull Amplifier . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 Biased PushPull Amplifier . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 1 Common-Emitter Amplifier (Level-Shifter Amplifier) Building and testing of this circuit will take the majority of this laboratorys time. Do not be discouraged if things move slowly through this circuit. The remaining four parts of the lab move quickly. If you have trouble, consult the troubleshooting section below on page 2 . Input: 0 . 5 V amplitude (1 V pp ) and 0 offset On older generators, press AMPL 20 dB button to get Amplitude knob to reach 0 . 5 V Use 1 kHz frequency during testing Output: 6 V pp and 5 V offset (i.e., circuit gain of 6 with 5 V offset shift ) Pick R C 300 k so that the scope and probe do not load the high-impedance output. Otherwise, your output may look severely attenuated (especially at 15 kHz due to capacitive loading). Pick R 1 and R 2 as large as possible while maintaining R 1 bardbl R 2 R E with 100 Plot collector waveforms with 2 V / div and others with 1 V / div . Align grounds on a low grid line. For 100 Hz , 1 kHz , and 15 kHz inputs, Use Quick Meas to show input Peak-to-Peak , output Peak-to-Peak , and output Average Save input and collector (i.e., output) together on same screen . Find gain and offset....
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lab1_bjt_procedure - ECE 327: Electronic Devices and...

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