EET 331 – LABOR The goalcourses rAmplifie Each gro SECTIO 1.1 Simu1.2 Calc1.3 Calc1.4 Build1.5 Meas1.6 Meas1.7 Meas Compare SECTIO - CIn - Cwfon – Review Labor ELECTRRATORY EX of this laborregarding aners. oup will be wON 1.- For yulate the gainulate the inpulate the outd your circuisure magnitusure input imsure output ie the simulatON 2. LaborCreate an indnclude all thComment on what did not wor your laboregative comratory TechniquRICAL ENEEXPERIENCratory experalysis, simulworking on thyour assignen (magnitudput impedanctput impedanit ude and phasmpedance ofimpedance otion versus thratory repordividual lab e informatiothe difficultwork, what yratory work mments. ues NGINEERT 331 – ELELABORATOCE: Reviewrience is for lation, buildhe circuit froed circuit do e and phase)ce of the circnce of the cise of the gaif the circuit. of the circuithe experimert report usingon that you bties and chalyou liked, wor your courRING TECECTRONICORY EXPERw of Laboratstudents to rding and testiom Appendithe followin) of the circucuit at aboutircuit at abouin from 1 Hz Follow the t. Follow thental results.g the guidelinbelieve is necllenges of thiwhat you didnrse will not bCHNOLOGC DESIGNRIENCES tory Technireview the coing of circuitx 1 assignedng activitiesuit from 1 Hzt 100 Hz. Veut 100 Hz. Vz to 1 MHz method expe method expnes providedcessary. is laboratoryn’t like, etc.)be affected aGY PROGiques oncepts learnts based on Od to that spec: z to 1 MHz erify with simVerify with sulained in Applained in Apd in the coury work (i.e. w). Be assuredat all by youpGRAM ned in previoOperational cific group.mulation ummation ppendix 2 ppendix 3 se’s websitewhat workedd that the graur positive orpage 1ous e. d, ade rEET 331 – Review Laboratory Techniques page 2 APPENDIX 1: Circuits for the different groups Circuit 1: Circuit 2: Circuit 3: Circuit 4: Circuit 5:EET 331 – Review Laboratory Techniques page 3 APPENDIX 2: Measuring Input Impedance of a circuit. Input impedance of a circuit is the ration between the voltage applied to the input of a circuit and the current that flows out of the voltage source. To measure the input impedance of a circuit, we CANNOT use a DMM. Instead, we use the following approach: Let’s assume that we want to measure the input impedance (Zin) of the black box shown in the figure below. To do this, we will place an external resistance (Rext) in series with the input of the circuit and will measure the voltages at both ends of Rext. Use the oscilloscope to measure these voltages. The current flowing into the input impedance is  . Applying KVL we have: 1         󰇛  󰇜 . From this equation we can solve for the value of the input impedance as:   21  2 EET 331 – Review Laboratory Techniques page 4 APPENDIX 3: Measuring Output Impedance of a circuit. We have defined in class the output impedance of a circuit as the impedance seen from the output when the independent sources are disabled. To calculate this value, the place a source at the output of the circuit and calculate the current that flows out of that source. In practice, however, circuits need their input source to perform as circuits and they complain when we connect a voltage or current source at the output. We cannot use a DMM either. Instead, we will use the following technique. Let’s assume that we have modeled the output stage of our circuit as a voltage source in series with its output impedance (Zout) that we want to measure experimentally: First, we measure the output voltage in open circuit and record this value. In this case, because there is no current flowing out of the output voltage, Vout = V1 We now connect a variable resistor at the output of the circuit: Circuit(black box)ZoutVout Because of the next current path, the voltage measured at the output of the circuit will decrease (there is a voltage drop across Zout). Modify the value of the potentiometer until the voltage that we measure is half of V1. At this point, the value of the potentiometer is equal to the value of the circuit’s output impedance. Be careful with a couple of items: Select the value of the external potentiometer in a range similar to the expected value for Zout. You may have to reduce the input voltage if the output starts saturating. Circuit(black