PSU EET 331 - Composite Amplifiers (5 pages)

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Composite Amplifiers



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Composite Amplifiers

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Pages:
5
School:
Pennsylvania State University
Course:
Eet 331 - Electronic Design

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ELECTRICAL ENGINEERING TECHNOLOGY PROGRAM EET 331 ELECTRONIC DESIGN LABORATORY EXPERIENCES LABORATORY EXPERIENCE Composite Amplifiers The goal of this laboratory experience is double First students are introduced to Operational Amplifiers other than the 741 used in previous experiences In particular you will work with 2 Operational Amplifiers with very different DC and AC specifications powered with 5 VDC The second goal is to investigate the characteristics of the Composite Amplifiers taking advantage of the benefits of specific devices while trying to minimize the effects of their shortcomings This experiment has been adapted from the course EET 368 Electrical and Computer Engineering Technology Department Purdue University SECTION 1 DC characteristics of the AD817 Operational Amplifier We will investigate the DC characteristics of this Operational Amplifier by using an Inverting Amplifier 1 1 Design the schematic for an Inverting Amplifier using the AD817 with a gain of 82 and an input impedance of 10 k 1 2 Read the specifications of the AD817 Evaluate the typical and worst case values of offset voltage at the output of the Inverting Amplifier that we can expect Explain to your instructor how did you arrive to this number Voffset typical Voffset worst case 1 3 Build the Inverting Amplifier that you designed in 1 1 Do not forget to include the decoupling capacitors Connect them directly to the power pins Remember that this Operational Amplifier will be powered with 5 VDC For input signal use a sine wave 20 mVp no DC offset at 100 Hz 1 4 Monitor the output of the Inverting Amplifier with the oscilloscope If the signal is distorted reduce the amplitude of the input signal If the output appears to be oscillating connect small decoupling capacitors in parallel with the 47 F EET 331 Composite Amplifier Lab 1 5 1 5 Measure and record the gain of the Inverting Amplifier as well as the DC offset voltage Use the DMM to record the DC offset voltage more accurately 1 6



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