Download Op Amp III Lab: Integrating, Differentiating & Square Wave Circuits (75 characters) and more Lab Reports Electrical and Electronics Engineering in PDF only on Docsity! ECE 3254 Name: Operational Amplifier III Partner(s): Laboratory #9 PRELAB Bench: Read over laboratory #9 and the prelab notes.. Questions: 1. (back to the basics!) d(sin2πft)/dt = ∫sin2πft dt = 2. Describe the output of the circuit (by using the integrator or the differentiator) the shape and/or angle differences that result from the following: a sketch might be useful! Derivative of sine wave Derivative of a triangular wave Integral of a sine wave Integral of a square wave 4. Determine the relationship for VO(t) in terms of Vg(t) for the circuit in Figure 9-1 with Resistor R2 removed from the circuit. Do not use AC phasor analysis, which only applies to sinusoidal signals in the frequency domain response. Remember that Ic = C*dVc(t)/dt VO(t) = Determine VO(t) when Vg(t)= sin2π100t and enter this in Part I-1 on the Data Sheet. VO(t) = 5. Determine the relationship for VO(t) in terms of Vg(t) for Figure 9-2 with R1 shorted. Do not use phasor analysis. Remember that Ic = C*dVc(t)/dt VO(t) = Determine VO(t) when Vg(t) = sin2π100t and enter this in Part II-1 on the Data Sheet. Do not use phasor analysis. VO(t) = ECE 3254 Lab 9 Page 1 of 5 ECE 3254 Name: Operational Amplifier III Partner(s): Laboratory #9 Last Revised: 10-07-2008 Bench: OBJECTIVES: The purpose of this experiment is to further study the circuits that can be made with operational amplifiers. Applications are an integrator, a differentiator, and a square wave generator. EXERCISES: This laboratory is broken into three parts: Part I: Integrating Circuit Part II: Differentiation Circuit Part III: Square Wave Generator Part I: INTEGRATING CIRCUIT Figure 9-1 Inverting Integrating Circuit R1 = 10 kΩ, R2 = 1 MΩ, R3 = R1\\R2 equivalent ≈ R1, C2 = 0.1uF 1. Connect the circuit in Figure 9-1. Let f = 100 Hz and Vg ≈ 2Vpp. Monitor Vo with the oscilloscope to make sure the output is not distorted. The scope should be set on DC coupling and the output signal DC offset should be less than 0.3V. Verify that the circuit is integrating by finding the phase difference between Vg and Vo, and showing that it is 90º. Note: To use quick measure to find phase differences, you must connect Vo to CH1 of the oscilloscope and Vg to CH2. Record your Vi and output waveform measurements on the Data sheet. Use the computer to capture the input and output waveforms and save them as a jpeg file. Place the red cursor at a maximum of the input waveform and the blue cursor at a maximum of the output waveform. PRINT the jpeg, label the input and output traces, title the print, write your name(s) on the print, and attach it to your Data Sheet. ECE 3254 Lab 9 Page 2 of 5
