Fall22_ECE210_report3-5

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School

University of Illinois, Urbana Champaign *

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Course

210

Subject

Electrical Engineering

Date

Apr 3, 2024

Type

pdf

Pages

1

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Report
ECE210 Laboratory Lab Report #3 Fall 2022 Net ID: , Student Name: Lab section: 2 Laboratory exercise 2.1 Frequency Response H ( ! ) The frequency response H ( ! ) of a linear and dissipative time-invariant circuit contains all the key information about the circuit which is needed to predict the circuit response to arbitrary inputs. Its magnitude | H ( ! ) | is known as amplitude response and \ H ( ! ) is usually referred to as phase response . In this section, you will construct an active bandpass filter circuit and measure its amplitude response over the frequency range 1-20 kHz. 1. Construct the circuit shown in Figure 4 on your protoboard. For now, do not connect it to the three-stage circuit from Lab 2. Remember the rules for wiring and using the 741 op-amp, which are repeated in Figure 3. V CC + + - V CC - 1 2 3 4 8 7 6 5 Pins 1,5 o ff set null correction — not used 2 inverting input (-) 3 non-inverting input (+) 4 V CC - supply set to -5 V (DC) 7 V CC + supply set to 5 V (DC) 6 output voltage v o 8 not connected Figure 3: Pin-out diagram for the 741 op-am. Figure 4: Circuit for analysis in prelab and lab. 2. Enable the 5V DC supplies, then connect a 14 kHz sine wave with amplitude 1V as the AC input v i ( t ) . Display v i ( t ) on channel 1 of the oscilloscope and v o ( t ) on channel 2. Set the Time Base around 20 μ s. (You should obtain an output of approximately of 900 mV amplitude at the frequency of 14 kHz) Page 3 of 8
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