EEE 202 Lab 6 Data Sheet

docx

School

Johns Hopkins University *

*We aren’t endorsed by this school

Course

202

Subject

Electrical Engineering

Date

Apr 3, 2024

Type

docx

Pages

Uploaded by AgentCrown4453

Name: EEE 202 Lab 6 Data Sheet Operational Amplifiers Part 0: Waveform Generators and Oscilloscopes 1) What is the maximum voltage rating on your Waveform Generator? 5V 2) Adjust the WFG to output a 1V (peak to peak) sine wave with a frequency of 2 kHz. Take a screenshot or photo of your waveform on the oscilloscope and include it here: 1

3) What is the input impedance of the oscilloscope? 4) What is the maximum acceptable input voltage for the oscilloscope? (Hint: read the manual or watch the supplier’s video here: https://youtu.be/HUAy0J3XqaU ) 5) What is the voltage resolution of the oscilloscope? Hint: resolution= V max − V min 2 ¿ bitsresolution [Do not forget the units] Part 1: Voltage Reference Connect the circuit in Part 1 of the manual. In each case below, record relationship between R A and R B , their actual values, and V Ref measured at the junction between them based on a multimeter measurement. Include a photo of your hardware circuit here (only include that of one of the five following cases): Resistor Values (kOhms) Multimeter measurement 1) R A = 10 R B = 10 V Ref = 2 V reason for discrepancy with 2 V expectation: 2) R A = 181K=178K I A = 0.44 MA I B = 0.22MA I C = 0.22 MA 3) R A = 1.5 K I A = 4.4MA. I B = 2.28MA I C = 2.288MA 4) R A = 47K R B = 47K Computed to be 50k, 47k is closest single V Ref = 2.038V 2

resistor value available in kit. reason for discrepancy with 2 V expectation: 5) R A = ________ R B = ________ VRef = _________ reason for discrepancy with 2 V expectation: Part 2: Simulation of Inverting Op-Amp in LTSpice Build this circuit in LTspice. Use the OP07 OP Amp on LTSpice for this circuit. Include a screenshot of the LTSpice circuit here: 3

Your preview ends here

Eager to read complete document? Join bartleby learn and gain access to the full version

Access to all documents
Unlimited textbook solutions
24/7 expert homework help

Show your work for calculating your resistor values: 4

Resistor values R A = __________, R B = ____________, R 1 = ____________, R 2 = _______________ Build your circuit in LTSpice and run a Transient Simulation (use OP07). Plot the output and input waveforms of your op-amp circuit. You should show at least one period and the voltage scale should be 0 to 4 V. (Label and attach the LTSpice schematic and plot to the lab data sheet. Be sure to label your nodes.) Screenshot of LTSpice schematic circuit: 5

Screenshot of LTSpice Plot (output and input voltage on the same plot): Part 3: Physical Validation Inverting Configuration of the Op-Amp Build the Physical Prototype of the circuit and include an image (use OP484 or MCP6022). Your Inverting Configuration design on the prototype board, should contain resistors, connection wires, and the Op-Amp. (Attach the image of your physical circuit to the lab data sheet.) Include a photo of your hardware circuit here: 6

Your preview ends here

Eager to read complete document? Join bartleby learn and gain access to the full version

Access to all documents
Unlimited textbook solutions
24/7 expert homework help

Capture the screenshot of your oscilloscope waveforms showing the channel 1 input from the waveform generator and the channel 2 output of the Op-Amp. You should display a stable image triggered on channel 1 with at least one period of the sinusoid and a voltage range of 0 – 4V. Include a screenshot of your waveforms here: Is your Op-Amp a “rail-to-rail” Op-Amp? If not, what are the upper and lower clipping voltages? Yes my Channel 2 railing at 4 Amps and 0 Amps 7

Discussion: How do your calculation, simulation, and measurement results compare? Did the “ideal op-amp” calculations closely match what was seen in the physical circuit? The physical models rails at 4V and 0V, unlike the simulation for some reason, but calculation are very similar to physical model. What is your explanation for any differences you see? My input simulation might be little different. What advantages/disadvantages do you see in using op-amps? The op-amp can be used for little gain. Which did you like better, simulation of the circuit, or physically building it? Which one would you prefer to do in your career design, simulation verification, or physical implementation? Physical model is more fun. Also, I am a HVAC tech. I do hands on work all the time. 8